[Blob]ARM migration (Azure#21117)

* [Blob]ARM migration

* add testcase

* fix test

* change settings_fake

* queue migration

* fileshare migration

* changefeed partial migration

* fix yml

* fix import

* fix test

* extract common fake credential

* rename to account fake key

* get rid of mgmt_settings_real

* extract LogCaptured to devtools_testutils

* add init

* fix datalake live test

* fix datalake live test

* fix live test. Not sure why it didn't fail before

* bug in code (not sure why it didn't fail before)

* fix live test

* fix test

* fix pylint

Author: xiafu-msft

eng/CredScanSuppression.json

@@ -46,7 +46,7 @@
                 "sdk/identity/azure-identity/tests/ec-certificate.pem",
                 "sdk/core/azure-servicemanagement-legacy/tests/legacy_mgmt_settings_fake.py",
                 "sdk/storage/azure-storage-blob/tests/fake_credentials.py",
-                "sdk/storage/azure-storage-file-datalake/tests/fake_credentials.py",
+                "tools/azure-sdk-tools/devtools_testutils/fake_credentials.py",
                 "tools/azure-sdk-tools/devtools_testutils/mgmt_settings_fake.py"
             ],
             "_justification": "File contains private key used by test code."