Add instrumentation logger for Ci::RegisterJobService

What does this MR do and why?

Ci::RegisterJobService sometimes takes a longer time than it should. However, it's not easy to debug the slowness with the current instrumentation tools.

In this change, we are adding a new logger, inspired by the Pipeline Logger, to this service.

Currently, the log condition is 5 seconds. And it's behind an ops feature flag; ci_register_job_instrumentation_logger. #512402

Related to #450674+

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Screenshots or screen recordings

{
  "severity": "INFO",
  "time": "2025-01-09T10:02:46.768Z",
  "correlation_id": "01JH5884JDPNG8PKBBTE2SMB22",
  "meta.caller_id": "POST /api/:version/jobs/request",
  "meta.remote_ip": "127.0.0.1",
  "meta.feature_category": "continuous_integration",
  "meta.http_router_rule_action": "proxy",
  "meta.user": "root",
  "meta.user_id": 1,
  "meta.project": "root/basic",
  "meta.root_namespace": "root",
  "meta.client_id": "runner/27",
  "meta.pipeline_id": 1388,
  "meta.job_id": 73110,
  "class": "Ci::RegisterJobService::Logger",
  "message": "RegisterJobService exceeded maximum duration",
  "total_duration_s": 9.745669999625534,
  "runner_id": 27,
  "retrieve_queue_duration_s": {
    "count": 1,
    "max": 3.0118619999848306,
    "sum": 3.0118619999848306
  },
  "process_build_duration_s": {
    "count": 1,
    "max": 3.7078539999201894,
    "sum": 3.7078539999201894
  },
  "process_queue_duration_s": 9.745248999912292
}