TAS: cleanup TopologyUngater to prepare for ranks support

[mimowo]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

To prepare for the support for ranks.

Which issue(s) this PR fixes:

Part of #3533
Part of #3450

Special notes for your reviewer:

Here I split the podsetPodsToUngate function into 3 phases:

• listing the pods by podsForPodSet
• assignGatedPodsToDomains assigns gated pods to domains (for pods which are going to be ungated)
• podsToUngateInfo - translates the domainID information into node selectors for each pod to ungate

This allows to reuse easily the code for podsForPodSet and podsToUngateInfo in case of rank ordering.
The ideas is to split assignGatedPodsToDomains into two: assignGatedPodsToDomainsGreedy ( current), or assignGatedPodsToDomainsWithRanks (when ranks are available), but this will be follow up.

The follow up is WIP: #3539 - I added the bbec763 commit to make this PR consistent with the follow up and minimize future diff.

Does this PR introduce a user-facing change?

NONE

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mimowo

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[netlify]

✅ Deploy Preview for kubernetes-sigs-kueue canceled.

Name	Link
🔨 Latest commit	bbec763
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[mimowo]

/assign @PBundyra
cc @tenzen-y @gabesaba

[mimowo]

FYI, I have noticed I don't need receiver for some of the functions and so I added another commit bbec763, which is already aligned with the WIP follow up to support for Job: #3539

[PBundyra]

/lgtm

[k8s-ci-robot]

LGTM label has been added.

Git tree hash: 0c92023e4b0787730aea4b74704d0a8e337d274a