Sync with upstream `v1.29.4`

[rishabh-11]

What this PR does / why we need it:

Which issue(s) this PR fixes: Fixes #326

Special notes for your reviewer: IT pass for AWS

Release note:

Synced with upstream v1.29.4

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[rishabh-11]

Do we not update SYNC-CHANGES with patch versions?

It is not needed IMO as the sync changes are for minor and not patch versions.

Can you please update the docstring of machine_cloud_provider.GetOptions to the new docstring here

The docstring is part of 1.30 and is also not present upstream. I think it is fine for us to keep it like this.

[aaronfern]

I think it is fine for us to keep it like this

Okay, fair enough for me then