[Serve] Unify logger and add user facing events

[simon-mo]

Why are these changes needed?

The PR unified the two logger used in the rayservice controller, and adds user facing events, looking like the following

Events:
  Type    Reason                    Age                    From                   Message
  ----    ------                    ----                   ----                   -------
  Normal  WaitForDashboard          2m33s (x2 over 2m33s)  rayservice-controller  Service "rayservice-sample-raycluster-97tzg-dashboard-svc" not found
  Normal  FailedServeDeploy         2m29s                  rayservice-controller  Put "http://rayservice-sample-raycluster-97tzg-dashboard-svc.default.svc.cluster.local:52365/api/serve/deployments/": dial tcp 10.72.1.85:52365: i/o timeout (Client.Timeout exceeded while awaiting headers)
  Normal  FailedServeDeploy         2m21s (x4 over 2m31s)  rayservice-controller  Put "http://rayservice-sample-raycluster-97tzg-dashboard-svc.default.svc.cluster.local:52365/api/serve/deployments/": context deadline exceeded (Client.Timeout exceeded while awaiting headers)
  Normal  SubmittedServeDeployment  2m17s (x8 over 2m20s)  rayservice-controller  Controller sent API request to update Serve deployments on cluster rayservice-sample-raycluster-97tzg
  Normal  Running                   2m (x10 over 2m2s)     rayservice-controller  The Serve applicaton is now running and healthy.

Related issue number

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • This PR is not tested :(

[Jeffwan]

The events are pretty helpful. great