feat: Add control plane telemetry - actor crashes counter and operation labels

[Angela (Angelawork)]

Fixes #564 (Part 2)

• Tests pass
• Appropriate changes to documentation are included in the PR

Description

This PR implements the second part of #564 by adding telemetry counter instrumentation for ate.actor.crashes in ateapi and establishing bounded label validation for operations and crash failure causes.

Key Changes:

• Updated maybeCrashActor and crashActor to reference ateattr.OperationName* constants and normalize opName.
• Passed explicit failure reasons (ReasonCorruptedAssignment, ReasonWorkerPodGone, ReasonWorkerReassigned) across workflow_resume.go, workflow_suspend.go, and workflow_pause.go.
• Instrumented WorkerPoolSyncer.releaseActorOnDeadWorker in syncer.go to record recordActorCrash when background pod deletion crashes an actor.
• Instrumented FinalizePausedStep in workflow_pause.go to record recordActorCrash when nodeName is missing during pause finalization.
• Added ate_actor_crashes to PlatformMetricPrefixes in collector_metrics.go.
• Added pre-creation resource cleanup in metrics_test.go to prevent AlreadyExists errors on test reruns.
• Updated metrics_test.go to trigger an actor crash via UpdateActor and ResumeActor, asserting ate_actor_crashes emission and label presence in OTel collector scrape outputs.

Testing

• go test -buildvcs=false ./cmd/ateapi/internal/controlapi/...
• go test -buildvcs=false ./cmd/atenet/internal/router/...
• make test

E2E Test

• ./hack/create-kind-cluster.sh
• ./hack/install-ate-kind.sh --deploy-ate-system --deploy-demo-counter
• ./hack/run-e2e.sh ./internal/e2e/suites/metrics/...