UPSTREAM: 35608: Update PodAntiAffinity to ignore calls to subresources

[soltysh]

Upon curling Pod's evict endpoint I'm getting: Resource was marked with kind Pod but was unable to be converted since the code in antiaffinity admission is trying to cast Pod to Eviction, which fails. This PR is a cherry-pick from upstream that fixes that problem.

[soltysh]

@mfojtik this is good to merge, since the upstream PR was approved. This will unblock QA testing PDB, so it's quite important to get in asap.

[openshift-bot]

[Test]ing while waiting on the merge queue

[soltysh]

Oh, that flake was fixed already, lemme rebase my PR.

[openshift-bot]

Evaluated for origin test up to 4cdfcfb

[openshift-bot]

continuous-integration/openshift-jenkins/test FAILURE (https://ci.openshift.redhat.com/jenkins/job/test_pr_origin/10861/) (Base Commit: 73c11af)

[mfojtik]

We need this to fix https://bugzilla.redhat.com/show_bug.cgi?id=1389255
Already added to list of cherry-picks for kube 1.4.

@ncdc fyi

[merge]

[soltysh]

Flake #11682.

[mfojtik]

[merge]

[soltysh]

Flake #10773.

@mfojtik mind retagging?

[mfojtik]

[merge]

[soltysh]

Looks like #9355.

[mfojtik]

[merge]

[openshift-bot]

Evaluated for origin merge up to 4cdfcfb

[soltysh]

What kind of dance should I make to merge this PR 💃 ? Or sacrificing 🐐 🍻 or anything else?

[openshift-bot]

continuous-integration/openshift-jenkins/merge SUCCESS (https://ci.openshift.redhat.com/jenkins/job/test_pr_origin/11072/) (Base Commit: 6abb256) (Image: devenv-rhel7_5307)