* gke-cluster-standard: upgrade `monitoring_config` to use object style. Add tests.
* gke-cluster-standard: update docs
* gke-cluster-autopilot: move gateway_api_config block (cosmetic change)
* gke-cluster-autopilot: update docs and fix typos
* Update blueprints due to `monitoring_config` changes in `gke-cluster-standard`.
* Update FAST due to `monitoring_config` changes in `gke-cluster-standard`.
* Update docs for affected blueprints and FAST stages