ray-operator: Reuse contexts across ray operator reconcilers

[anishasthana]

cc @kevin85421

Why are these changes needed?

Related issue number

Closes #1089

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests

I deployed using the instructions in development.md. I tested with the smallest sample: https://raw.githubusercontent.com/ray-project/kuberay/master/ray-operator/config/samples/ray-cluster.mini.yaml

[blublinsky]

Thanks @anishasthana

[kevin85421]

Thank you, @anishasthana, for this pull request, and thank you, @blublinsky, for raising this issue! It is a bit embarrassing, but I do not know much about context.

• Will this change (replace context.TODO with the existing one) make operator have different behaviors?
• Would you mind adding more details about the advantages of using the existing context?

Thanks!

[blublinsky]

@kevin85421 A good description of context is here https://betterprogramming.pub/how-and-when-to-use-context-in-go-b365ddf42ae2. In a nutshell, propagating a context, instead of creating a new one every time conserves resources and allows an operator to better control the execution of the operator's sub/co routines

[kevin85421]

LGTM! Thank @anishasthana for this contribution and @blublinsky for the review! The article is very helpful.