Add SandboxTemplateRefAnnotation and e2e tests for warmpool rollout #562

k8s-ci-robot merged 6 commits intokubernetes-sigs:mainkubernetes-sigs/agent-sandbox:mainfrom

shrutiyam-glitch:e2e-rollout-testshrutiyam-glitch/agent-sandbox:e2e-rollout-testCopy head branch name to clipboard