Add test for autoscaler and its desired state

[dentiny]

Closes #2575

This PR adds a integration for autoscaling, basically spins up a bunch of tasks and check whether max pod replica count has reached during the process.

[kevin85421]

would you mind fixing the CI errors?

[dentiny]

would you mind fixing the CI errors?

Emmm ok, though it seems unrelated to my change

test/e2eautoscaler/support.go:44:30: `newConfigMap` - `name` always receives `"scripts"` (unparam)
func newConfigMap(namespace, name string, options ...option[corev1ac.ConfigMapApplyConfiguration]) *corev1ac.ConfigMapApplyConfiguration {

[dentiny]

test/e2eautoscaler/support.go

Updated.

[kevin85421]

@MortalHappiness would you mind reviewing this PR?

[MortalHappiness]

By the way, test.T().Run is redundant. However, since it is not related to this PR, you can either remove it or keep it. But I think removing it would be simpler.

[dentiny]

By the way, test.T().Run is redundant. However, since it is not related to this PR, you can either remove it or keep it. But I think removing it would be simpler.

I'm following the existing coding style

[MortalHappiness]

I'm following the existing coding style

Yes, I know. I just found it redundant, so I mentioned that it is not related to this PR. However, removing it might make it easier for you to implement this test. It's up to you whether to remove it or keep it. I'll create a separate PR to remove them though.

[dentiny]

@MortalHappiness Updated PTAL

[MortalHappiness]

BTW please fix linter issue

[MortalHappiness]

LGTM