SecretMangerSecret spec.rotation.rotationPeriod incorrectly handled by the immutable webhook.

[yuwenma]

Checklist

• I did not find a related open issue.
• I did not find a solution in the troubleshooting guide: (https://cloud.google.com/config-connector/docs/troubleshooting)
• If this issue is time-sensitive, I have submitted a corresponding issue with GCP support.

Bug Description

This issue is for tracking purpose. There might be some prior art that determine to set the field as immutable.

The spec.rotation.rotationPeriod is a mutable field. The GCP server allows updating its value. However, the Terraform-based approach raises the following errors if the field is changed.

{"severity":"info","timestamp":"2024-10-31T04:37:17.605Z","msg":"resource is not ready","kind":"SecretManagerSecret","name":"secretmanagersecret-qvghyx4vjl63hwa","conditions":[{"lastTransitionTime":"2024-10-31T04:36:45Z","message":"Update call failed: cannot make changes to immutable field(s): [Field Name: rotation.0.rotationPeriod, Got: 7200s, Wanted: 3600s]; please refer to our troubleshooting doc: https://cloud.google.com/config-connector/docs/troubleshooting","reason":"UpdateFailed","status":"False","type":"Ready"}]}

Additional Diagnostic Information

n/a

Kubernetes Cluster Version

n/a

Config Connector Version

n/a

Config Connector Mode

namespaced mode (default)

Log Output

No response

Steps to reproduce the issue

hack/record-gcp fixtures/secretmanagersecretfull

YAML snippets

No response