End-to-end test case for cluster autoscaling

[mbarnes]

ARO-22328 - E2E Test Suite: Support global autoscaling configuration

What

Jira indicates @shitaljante may already be working on this. I'll sync with her to see where she's at with it. For now this is just a stash of what I had previously written.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
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[shitaljante]

This PR is currently blocked by the update functionality introduced in #3541

[SudoBrendan]

Thanks for the PR! Overall, things are looking pretty good.

1. I think there's a few minor bugs to address
2. More importantly, we need to double-check that all of these timeouts are correct. The current test execution time of just this suite is something like 3-5 hours if we're hitting those timeout conditions.

[shitaljante]

/test e2e-parallel

[mbarnes]

I can't approve this since I originally submitted the PR.

I think this is overall good for a first pass. Some parts of this just look like it's testing validation, which I don't think E2E is the right context for. We have unit and simulation tests for validation testing.

The last test ("it should respect cluster-wide node limits with nodepool autoscaling") is the most important since it tests the interaction between cluster-wide autoscaling parameters and node pools. We could use more test cases that demonstrate this interaction, but this one case is good enough to prove the values are getting down to the customer cluster.

[geoberle]

/lgtm
/approve

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: geoberle, mbarnes

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Requests appear to have been addressed. Dismissing to allow merging.