Compute: add support for instance reservation_affinity

[modular-magician]

reservation_affinity controls how instances or instances created from
templates consume Compute Engine resource reservations.

Fixes #4593

This hoists my PR from #7669 up to magic-modules so this effort is not on someone else to do.

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Release Note Template for Downstream PRs (will be copied)

compute: added `reservation_affinity` to `google_compute_instance` and `google_compute_instance_template`

Derived from GoogleCloudPlatform/magic-modules#4335

[mmllc-jsilverman]

Is this what causes my TF plan to want to delete all resources and rebuild them? I can't tel if this code made it into gcp provider > 3.66.1

[balonik]

@mmllc-jsilverman I can use it with google provider 3.71.0

[mmllc-jsilverman]

@mmllc-jsilverman I can use it with google provider 3.71.0

I am almost certain that this change is what is causing my problem; the TF cloud run worked when I pinned the provider to the one I am using locally.

I'll just add the reservation_affinity value to my terraform manifests and see if that fixes this for me.

[github-actions]

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