Updating RemoteRendering SDK to be based on latest API spec and make classes more mockable

[AleksandarTomicMs2]

This PR regenerated the SDK based on minor API changes (Azure/azure-rest-api-specs#12920) and makes the classes more mockable.

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• Include updated management metadata.
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Old outstanding PR cleanup

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[AleksandarTomicMs2]

/azp run net - mixedreality - ci

[azure-pipelines]

Commenter does not have sufficient privileges for PR 18694 in repo Azure/azure-sdk-for-net

[matyrr-havok]

/azp run net - mixedreality - ci

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[ghost]

Hello @MalcolmTyrrell!

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