[release-4.16] OCPBUGS-43668: fix(discovery): Handle cache.DeletedFinalStateUnknown in node informers' DeleteFunc

[openshift-cherrypick-robot]

This is an automated cherry-pick of #229

/assign openshift-ci-robot

[openshift-ci-robot]

@openshift-cherrypick-robot: Detected clone of Jira Issue OCPBUGS-43378 with correct target version. Will retitle the PR to link to the clone.
/retitle [release-4.16] OCPBUGS-43668: fix(discovery): Handle cache.DeletedFinalStateUnknown in node informers' DeleteFunc

In response to this:

This is an automated cherry-pick of #229

/assign openshift-ci-robot

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[openshift-ci-robot]

@openshift-cherrypick-robot: This pull request references Jira Issue OCPBUGS-43668, which is invalid:

• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.
• expected dependent Jira Issue OCPBUGS-43667 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is New instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

This is an automated cherry-pick of #229

/assign openshift-ci-robot

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[openshift-ci]

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[simonpasquier]

/label backport-risk-assessed
/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: openshift-cherrypick-robot, simonpasquier

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[machine424]

/jira refresh

[openshift-ci-robot]

@machine424: This pull request references Jira Issue OCPBUGS-43668, which is invalid:

• expected dependent Jira Issue OCPBUGS-43667 to be in one of the following states: VERIFIED, RELEASE PENDING, CLOSED (ERRATA), CLOSED (CURRENT RELEASE), CLOSED (DONE), CLOSED (DONE-ERRATA), but it is ASSIGNED instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

In response to this:

/jira refresh

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