GKE cluster modules: add optional kube state metrics

[olliefr]

Provider version v4.82.0 introduced support for optional kube state metrics in GKE.

This pull request adds support for these metrics to gke-cluster-standard and gke-cluster-autopilot modules.

This was requested by @juliocc in #1665 (comment)

I also updated the blueprints that depend on gke-cluster-* modules as well as the relevant FAST stage.

There are some updates to the docs and new tests as well.

Checklist

I acknowledge that I have:

• Read the contributing guide
• Ran terraform fmt on all modified files
• Regenerated the relevant README.md files using tools/tfdoc.py
• Made sure all relevant tests pass

[juliocc]

No comments, just great.

[juliocc]

Oh you'll have to bump the provider version. Update the default-version.tf in the root and then find -name versions.tf -exec cp default-versions.tf {} \;

[olliefr]

@juliocc thanks for the tip! Provider version bumped up as you have suggested. Hopefully it'll work this time...