REPLACE-WITH-JIRA-KEY: Bump k8s dependencies to 1.36.2

[dfarrell07]

Summary

Rebase Kubernetes dependencies from 1.35 (v0.35.2) to 1.36.2 (v0.36.2), Go from 1.25 to 1.26.

What changed

• Dependencies: All k8s.io/* packages bumped to v0.36.2, controller-runtime v0.23.3→v0.24.1, controller-tools v0.20.1→v0.21.0, konnectivity-client v0.34.0→v0.36.0
• Go version: 1.25→1.26 in go.mod, Dockerfile, .ci-operator.yaml
• Codegen: CRD manifest annotation updated (controller-gen v0.20.1→v0.21.0)
• Feature gate: Added KUBE_FEATURE_WatchListClient=false in hack/test-go.sh to prevent test hangs with fake clientsets
• Dep changes: go-grpc-prometheus replaced by go-grpc-middleware/providers/prometheus (upstream migration), k8s.io/streaming added (new in 1.36), google/btree removed

Commits

Commit	Description	Type
41ba266	Rebase k8s-rebase-1.36.2 to k8s 1.36	Mechanical (deps)
2cfde3f	Update codegen for k8s 1.36	Mechanical (codegen)
bff8adc	Update version references for k8s 1.36	Mechanical (version refs)
ae34152	Disable WatchListClient feature gate in test-go.sh	Fix

Verification

Locally verified (all in Go 1.26.0 container):

• go build ./... — PASS
• go vet ./... — PASS
• golangci-lint run — PASS
• go test ./... — PASS (1 pre-existing failure in pkg/controller/proxyconfig due to missing CA trust bundle in container — not related to this change)
• go mod verify — all modules verified
• No Go source files changed outside vendor/

Prerequisites

• CI builder images rhel-9-golang-1.26-openshift-4.22 must be available in the registry

Notes

• Zero Go source code changes were required — the k8s 1.36 APIs had no breaking changes affecting this project
• All commits carry Assisted-by: Claude Code trailers

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[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: dfarrell07
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