…into protocol_base

* 'master' of https://github.com/Azure/azure-sdk-for-python: (229 commits)
  Sync eng/common directory with azure-sdk-tools for PR 1688 (#19272)
  update all ubuntu vmImage to 20.04 (#19227)
  add base class for feedback (#19265)
  Enable tests for integration samples (#18531)
  docs: fix a few simple typos (#19127)
  Increment package version after release of azure-eventgrid (#19197)
  Increment package version after release of azure-monitor-query (#19208)
  earliest versions of communication identity tests are set up improperly. skip 1.0.0 in regression testing (#19258)
  Run mypy in azure-keyvault-administration CI (#19246)
  [text analytics] change return type of analyze actions to list of list (#18994)
  Increment package version after release of azure-data-tables (#19192)
  suppress min number less than 14 (#19230)
  [Key Vault] Address administration feedback (#19099)
  [textanalytics] remove warning tests (#19217)
  [translation] enable samples to run in CI (#19190)
  update custom_granularity_value to be more than 300 (#19215)
  Increment package version after release of azure-security-attestation (#19212)
  Enabling Before/After Test Customization for Standard CI Pipelines (#19187)
  bump sphinx version to resolve the weird issue with the caption not getting the correct class (#19188)
  [AutoRelease] t2-agrifood-2021-06-09-15946 (#19174)
  ...