Deferrable mode for EKS Create/Delete Operator

[syedahsn]

This PR adds deferrable mode to the EksCreateClusterOperator and EksDeleteClusterOperator. The associated unit tests are also included.

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[potiuk]

We just merged #31712 we should likely follow the way it is implemented.

@Lee-W : I think we might want to add a pre-commit with some AST parsing likely - to add a check for providers that if they are using defferable in operator's init, the default should be as implemented in #31712. I think this is the only way to avoid someone accidentally not using the deferrable configuration default. We cannot rely on reviewers remembering about it. But it should be relatively easy ot write a pre-commit that would verify that and fail the build in case someone does not use it.

We have a few pre-commits that use AST to inspect parsed code so you could take it as an example.

[ferruzzi]

One change required, and a few questions and nitpicks.

[Lee-W]

nitpick

Suggested change

	defexecute_failed(self, context, event=None):
	defexecute_failed(self, context: Context, event: dict[str, Any] |None=None)->None:

[syedahsn]

I've been using the function definition of the execute_* method from the official docs, which do it like this

[Lee-W]

Got it. Not sure whether we should update the doc there 🤔 Let me send a PR to see how others thinkg

[syedahsn]

I saw that your PR got merged. I added the change here, but I was having issues with mypy which didn't like the fact that event could be None:

airflow/providers/amazon/aws/operators/eks.py:766: error: Value of type
"Optional[Dict[str, Any]]" is not indexable [index]
if event["status"] == "success":

This can be solved by checking to make sure event is not None everytime:

if event and event["status"] == "success":

or remove None as an option and set the default to {}.
The last option is to simply ignore mypy, which is something I would rather avoid if possible.
I'm going with removing None as an option, but let me know if you think another option is more reasonable.

[Lee-W]

Sorry, I didn't notice this reply, but I think we agree to use the solution on #32355 (comment)

[Lee-W]

I'm unsure whether we should use {} as the default value. I believe it's generally not a good idea to use mutable object as default

[syedahsn]

hmm that's a good point. I guess I can set it to None and do a check for None before indexing it i.e.

if event and event["status"]

Its going to be tedious to do it everywhere, but I don't see a better option

[Lee-W]

Yep, I think this is the best option we have as of now.

[Lee-W]

same as #32355 (comment)

[Lee-W]

Yep, I think this is the best option we have as of now.

[Lee-W]

Sorry, I didn't notice this reply, but I think we agree to use the solution on #32355 (comment)

[Lee-W]

LGTM. Just left one minor nitpick.