[Refactor][RayJob] Use AssociationOptions and Delete isAllPodsRunning

[evalaiyc98]

Why are these changes needed?

This PR follows up on #2045. The objective of this PR is to uphold consistency in association methods and prevent the scattering of MatchingLabels usage throughout the entire codebase.

In this PR, I concentrate on modifying the files related to RayJob. This includes using the AssociationOptions function to replace the previous section and removing isAllPodsRunning function due to its lack of usage.

Related issue number

2045

Checks

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

[evalaiyc98]

Hi @rueian , could you help review this PR? I want to know if there is anything that needs improvement.

[rueian]

Hi @evalaiyc98,

These changes look good to me!

[evalaiyc98]

Close this PR because the issue has been resolved.