feat: sync v1 GKE API

fix: deprecate SetLocations; use UpdateCluster
refactor: provide name alias for GetOperation (as method signature annotation)
feat: support for GetJSONWebKeys
feat: support for Workload Identity
feat: support for Gvisor in nodes
feat: support for node reservation affinity
feat: support for Customer Managed Encryption in nodes
fix: deprecate basic auth fields (removed in 1.19 clusters)
feat: support for NodeLocalDNS
feat: support for ConfigConnector
feat: support for private cluster VPC peering
feat: support for CloudRun load balancers
feat: support using routes for pod IPs
feat: support for Shielded Nodes
feat: support for release channels
fix: deprecated Cluster/NodePool.status_message; use conditions
feat: support for disabling default sNAT
feat: operations now store more granular progress
feat: support for node Surge Upgrades
feat: support for updating node pool locations.
feat: support for Node Auto Provisioning
feat: support for specifying node disk size and type
docs: many minor documentation clarifications

PiperOrigin-RevId: 342116206