[template] Make README Logging section consistent (Azure#14022)

* [template] Make README Logging section consistent

We might have introduced the inconsistency for some libraries while copying
content from other languages.

* Update other README files

Contents for messaging libraries (Event Hub/Service Bus) remain unchanges
because they are different in having additional information about `rhea`
logging.

* linking to logger

Author: jeremymeng

sdk/anomalydetector/ai-anomaly-detector/README.md

@@ -157,16 +157,18 @@ More Samples can be found [here](https://github.com/Azure/azure-sdk-for-js/tree/
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
-You can set the following environment variable to see debug logs when using this library.
+Enabling logging may help uncover useful information about failures. In order to see a log of HTTP requests and responses, set the `AZURE_LOG_LEVEL` environment variable to `info`. Alternatively, logging can be enabled at runtime by calling `setLogLevel` in the `@azure/logger`:
 
-- Getting debug logs from the Azure Anomaly Detector client library
+```javascript
+import { setLogLevel } from "@azure/logger";
 
-```bash
-export DEBUG=azure*
+setLogLevel("info");
 ```
 
+For more detailed instructions on how to enable logs, you can look at the [@azure/logger package docs](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/core/logger).
+
 ## Next steps
 
 Please take a look at the

sdk/attestation/attestation/README.md

@@ -28,16 +28,18 @@ This SDK provides the following functionality for the Microsoft Azure Attestatio
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
-You can set the following environment variable to get the debug logging output when using this library.
+Enabling logging may help uncover useful information about failures. In order to see a log of HTTP requests and responses, set the `AZURE_LOG_LEVEL` environment variable to `info`. Alternatively, logging can be enabled at runtime by calling `setLogLevel` in the `@azure/logger`:
 
-- Getting debug logs from the Azure Attestation client library
+```javascript
+import { setLogLevel } from "@azure/logger";
 
-```bash
-export AZURE_LOG_LEVEL=verbose
+setLogLevel("info");
 ```
 
+For more detailed instructions on how to enable logs, you can look at the [@azure/logger package docs](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/core/logger).
+
 ## Next steps
 
 ## Contributing

sdk/core/core-amqp/README.md

@@ -31,7 +31,7 @@ Some of the key features of Azure Core AMQP library are:
 
 The core-amqp library depends on the [rhea-promise](https://github.com/amqp/rhea-promise) library for managing connections, and for sending and receiving events over the [AMQP](https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-complete-v1.0-os.pdf) protocol.
 
-### Enable logs
+### Logging
 
 You can set the `AZURE_LOG_LEVEL` environment variable to one of the following values to enable logging to `stderr`:
 

sdk/core/core-lro/README.md

@@ -60,7 +60,7 @@ You will be able to find some working examples of an implementation of an operat
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
 Logs can be added at the discretion of the library implementing the Long Running Operation poller.
 Packages inside of [azure-sdk-for-js](https://github.com/Azure/azure-sdk-for-js) use

sdk/digitaltwins/digital-twins-core/README.md

@@ -124,7 +124,7 @@ directory for detailed examples on how to use this library.
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
 Enabling logging may help uncover useful information about failures. In order to see a log of HTTP requests and responses, set the `AZURE_LOG_LEVEL` environment variable to `info`. Alternatively, logging can be enabled at runtime by calling `setLogLevel` in the `@azure/logger`:
 

sdk/eventgrid/eventgrid/README.md

@@ -266,14 +266,14 @@ receiver.subscribe({
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
-You can set the following environment variable to get the debug logging output when using this library.
+Enabling logging may help uncover useful information about failures. In order to see a log of HTTP requests and responses, set the `AZURE_LOG_LEVEL` environment variable to `info`. Alternatively, logging can be enabled at runtime by calling `setLogLevel` in the `@azure/logger`:
 
-- Getting debug logs from the Azure Event Grid client library
+```javascript
+import { setLogLevel } from "@azure/logger";
 
-```bash
-export AZURE_LOG_LEVEL=verbose
+setLogLevel("info");
 ```
 
 For more detailed instructions on how to enable logs, you can look at the [@azure/logger package docs](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/core/logger).

sdk/eventhub/event-hubs/README.md

@@ -450,7 +450,7 @@ main();
 
 The Event Hubs library depends on the [rhea-promise](https://github.com/amqp/rhea-promise) library for managing connections, sending and receiving events over the [AMQP](https://docs.oasis-open.org/amqp/core/v1.0/os/amqp-core-complete-v1.0-os.pdf) protocol.
 
-### Enable logs
+### Logging
 
 You can set the `AZURE_LOG_LEVEL` environment variable to enable logging to `stderr`:
 

sdk/eventhub/eventhubs-checkpointstore-blob/README.md

@@ -140,7 +140,7 @@ main();
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
 You can set the `AZURE_LOG_LEVEL` environment variable to one of the following values to enable logging to `stderr`:
 

sdk/formrecognizer/ai-form-recognizer/README.md

@@ -435,14 +435,14 @@ main().catch((err) => {
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
-You can set the following environment variable to see debug logs when using this library.
+Enabling logging may help uncover useful information about failures. In order to see a log of HTTP requests and responses, set the `AZURE_LOG_LEVEL` environment variable to `info`. Alternatively, logging can be enabled at runtime by calling `setLogLevel` in the `@azure/logger`:
 
-- Getting debug logs from the Azure Form Recognizer client library
+```javascript
+import { setLogLevel } from "@azure/logger";
 
-```bash
-export DEBUG=azure*
+setLogLevel("info");
 ```
 
 For more detailed instructions on how to enable logs, you can look at the [@azure/logger package docs](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/core/logger).

sdk/metricsadvisor/ai-metrics-advisor/README.md

@@ -472,16 +472,18 @@ async function queryAnomaliesByAlert(client, alert) {
 
 ## Troubleshooting
 
-### Enable logs
+### Logging
 
-You can set the following environment variable to see debug logs when using this library.
+Enabling logging may help uncover useful information about failures. In order to see a log of HTTP requests and responses, set the `AZURE_LOG_LEVEL` environment variable to `info`. Alternatively, logging can be enabled at runtime by calling `setLogLevel` in the `@azure/logger`:
 
-- Getting debug logs from the Azure MetricsAdvisor client library
+```javascript
+import { setLogLevel } from "@azure/logger";
 
-```bash
-export DEBUG=azure*
+setLogLevel("info");
 ```
 
+For more detailed instructions on how to enable logs, you can look at the [@azure/logger package docs](https://github.com/Azure/azure-sdk-for-js/tree/master/sdk/core/logger).
+
 ## Next steps
 
 Please take a look at the