Attestation/WSS Release

[bnichms]

Description

Add new cmdlets for AzureStack HCI new features:
-Attestation
-Windows Server Subscription

Checklist

• [Yes] I have read the Submitting Changes section of CONTRIBUTING.md
• [Yes] The title of the PR is clear and informative
• [Yes] The appropriate ChangeLog.md file(s) has been updated:
  • For any service, the ChangeLog.md file can be found at src/{{SERVICE}}/{{SERVICE}}/ChangeLog.md
  • A snippet outlining the change(s) made in the PR should be written under the ## Upcoming Release header -- no new version header should be added
• [Yes] The PR does not introduce breaking changes
• [Yes] If applicable, the changes made in the PR have proper test coverage
• [NoBreakingChanges] For public API changes to cmdlets:
  • a cmdlet design review was approved for the changes in this repository (Microsoft internal only)
    • {Please put the link here}
  • [Yes] the markdown help files have been regenerated using the commands listed here

[isra-fel]

/azp run azure-powershell - security-tools

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[isra-fel]

/azp run azure-powershell - security-tools

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[isra-fel]

LGTM