add Get-AzVmRunCommand on SDK built cmdlet

[grizzlytheodore]

Description

Get-AzVmRunCommand was originally autorest.powershell generated. But I am removing that from compute.autorest in this pr:
#19267

We are moving it to cmdlet built on SDK because we wanted to achieve two things:
Have all the fields show as a list format when we get back list of RunCommands
Have instanceView only show when -Expand InstanceView

So to achieve these customizations I moved it to cmdlet built on SDK here.

There is no breaking change here because currently from the documentation https://docs.microsoft.com/en-us/powershell/module/az.compute/get-azvmruncommand?view=azps-8.2.0, 1st, 2nd, and 5th(last) parameter sets arent working

And the one parameter set we are adding in this PR is a combination of 3rd and 4th parameter sets by having -RunCommandName as optional.

Checklist

• Check this box to confirm: I have read the Submitting Changes section of CONTRIBUTING.md and reviewed the following information:

• SHOULD select appropriate branch. Cmdlets from Autorest.PowerShell should go to generation branch.
• SHOULD make the title of PR clear and informative, and in the present imperative tense.
• SHOULD update ChangeLog.md file(s) appropriately
  • 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 in the past tense. Add changelog in description section if PR goes into generation branch.
  • Should not change ChangeLog.md if no new release is required, such as fixing test case only.
• SHOULD have approved design review for the changes in this repository (Microsoft internal only) with following situations
  • Create new module from scratch
  • Create new resource types which are not easy to conform to Azure PowerShell Design Guidelines
  • Create new resource type which name doesn't use module name as prefix
  • Have design question before implementation
• SHOULD regenerate markdown help files if there is cmdlet API change. Instruction
• SHOULD have proper test coverage for changes in pull request.
• SHOULD NOT introduce breaking changes in Az minor release except preview version.
• SHOULD NOT adjust version of module manually in pull request

[isra-fel]

/azp run azure-powershell - powershell-cor

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[isra-fel]

/azp run azure-powershell - powershell-core

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