Rename Microsoft.OpenTelemetry to Azure.Monitor.OpenTelemetry (Azure#18702)

Author: rajkumar-rangaraj

.github/CODEOWNERS

@@ -368,7 +368,7 @@ sdk/monitor/           @SameergMS @dadunl
 
 # PRLabel: %Monitor - Exporter
 # ServiceLabel: %Monitor - Exporter %Service Attention
-/sdk/monitor/Microsoft.OpenTelemetry.*/         @cijothomas @reyang @rajkumar-rangaraj @TimothyMothra
+/sdk/monitor/Azure.Monitor.OpenTelemetry.*/     @cijothomas @reyang @rajkumar-rangaraj @TimothyMothra
 
 # ServiceLabel: %Monitor - Metrics %Service Attention
 #/<NotInRepo>/            @AzMonEssential