fix: repair jwt e2e setup and worker test sync

[EItanya]

Summary

• add the missing ate-client ServiceAccount to JWT kustomize installs
• make worker pod test helpers wait on the worker cache used by ResumeActor scheduling

Verification

• kubectl kustomize manifests/ate-install/jwt --load-restrictor LoadRestrictionsNone
• kubectl kustomize manifests/ate-install/kind-jwt --load-restrictor LoadRestrictionsNone
• go test ./cmd/ateapi/internal/controlapi -run TestResumeActor_DanglingWorker -count=100 -v
• go test ./cmd/ateapi/internal/controlapi
• hack/run-e2e-kind.sh -v -args --no-color