…into get_testserver_working

* 'main' of https://github.com/Azure/azure-sdk-for-python: (45 commits)
  ignore coretestserver readme (Azure#19436)
  Add Ubuntu 20 to local dns bypass template (Azure#19432)
  Sync eng/common directory with azure-sdk-tools for PR 1729 (Azure#19415)
  Async/BearerTokenCredentialPolicy consistently calls on_exception (Azure#19195)
  [EventHubs] Fix bug in sending stress test code and update default stress test settings (Azure#19429)
  [EventHubs] Get IoT Hub Name from Redirect Address in sample (Azure#19314)
  [textanalytics] regen on v3.1 (Azure#19193)
  Adapt EG to arm template (Azure#19262)
  [Key Vault] Extend pipeline test timeout (Azure#19404)
  Update platform matrix to ubuntu 20 (Azure#19296)
  [AppConfig] Add lock to SyncTokenPolicy (Azure#19395)
  Regenerate monitor code (Azure#19375)
  Increment version for keyvault releases (Azure#19402)
  Aggregation should be a list (Azure#19381)
  [azure-mgmt-monitor] skip test to unblock ci (Azure#19390)
  Cloud event should parse smaller ms precisions (Azure#19259)
  Update release date (Azure#19399)
  [Communication]: use x-ms-date for hmac (Azure#19396)
  [Key Vault] Performance tests for certificates, keys, and secrets (Azure#19002)
  Deprecate azure-monitor (Azure#19384)
  ...