common.CompareProtoMessage function does not work on proto fields without annotation

[gemmahou]

Checklist

• I did not find a related open enhancement request.
• I understand that enhancement requests filed in the GitHub repository are by default low priority.
• If this request is time-sensitive, I have submitted a corresponding issue with GCP support.

Describe the feature or resource

The CompareProtoMessage function checks proto annotation to determine output-only fields, and immutable fields but it has certain limitations:

See comment: #3653 (comment)

I've also noticed that compute resources do not have that annotation: https://screenshot.googleplex.com/BxLQE5WtTjJPTRd.png

Additional information

No response

Importance

No response

[gemmahou]

cc: @yuwenma