Feature/node group sa main part

[negrovalar]

Following up on the previous PR (#156
) I split it into two parts - soperator module and main part.
This is the main part. Please merge it after the soperator part - #182.
And please run all available auto-tests.

[malibora]

@negrovalar why should we merge only after soperator pr? There shouldnt be any connection between the two, right?

[negrovalar]

Correct, no dependency on soperator module. You can merge it at your convenience.

[malibora]

@negrovalar pls run "terraform fmt -recursive" in hte solution so that the tests can pass

[negrovalar]

@malibora done, please check

[malibora]

@negrovalar we got a new error:

I think the reason is that tests run k8s-training and k8s-inference in parallel so that's why service account already exists.

Additional, the script needs to be idempotent even with its self, can you pls add a random sufix so that this works? You can use the one from locals, as we do for other resources:

nebius-solution-library/k8s-training/locals.tf

Line 2 in 8dcf285

release-suffix = random_string.random.result

[negrovalar]

@malibora thanks for the great advice - I added randomness into SA name.