[moc] Implement Graceful Shutdown Option for VM Stop Operation

[arg5739]

Problem Statement

When users select "Stop" for a virtual machine (VM) through the portal or CLI, the system currently performs an immediate "Turn Off" operation rather than executing a graceful shutdown. This behavior does not align with user expectations and has become a significant pain point, as customers anticipate a proper shutdown sequence when choosing to stop their VM.

Related PRs

[MOC] #404
[WSSD-SDK] https://github.com/microsoft/wssd-sdk-for-go/pull/342
[MOC-SDK] microsoft/moc-sdk-for-go#359
[MOCCLI] https://github.com/microsoft/moccli/pull/352
[CloudAgent] In progress
[NodeAgent] In progress

WorkItem

https://msazure.visualstudio.com/One/_workitems/edit/30775126

Summary of changes

These PRs accomplish the following:

• Provide new power option StopGraceful
• Implement StopGraceful shutdown
  The parameter to request non-graceful VM shutdown. True value indicates non-graceful shutdown whereas false indicates otherwise. Default value for this flag is false if not specified
• Make previous "Stop" calls "StopGraceful" with skipShutdown=true to force immediate shutdown. Maintaining current Stop behaviour.

Testing

In progress

[arg5739]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

[arg5739]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[arg5739]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[jocardeMSFT]

Please fix up the description to include screenshots from manual testing performed since this precedes automated testing.

Please fix up the title of the PR to match the changes

[jocardeMSFT]

this looks stale, remove.

[jocardeMSFT]

VirtualMachine_StopGraceful?

[jocardeMSFT]

I believe this is leftover and needs to be cleaned up.

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