Get-AzVMDSCExtension and Get-AzVMDSCExtensionStatus new parameter set VMParameterSet for new parameter VM

[Sandido]

Work for item: https://msazure.visualstudio.com/One/_workitems/edit/8742543
For bug: #13353
PS Design Review: https://github.com/Azure/azure-powershell-cmdlet-review-pr/issues/794

These edits will allow a VM object to be piped into the DscExtension cmdlets, where previously there was an error. This change will not interfere with existing functionality.

Description

Checklist

• I have read the Submitting Changes section of CONTRIBUTING.md
• The title of the PR is clear and informative
• 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
• The PR does not introduce breaking changes
• If applicable, the changes made in the PR have proper test coverage
• 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}
  • the markdown help files have been regenerated using the commands listed here

[Sandido]

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