Sync upstream cluster-autoscaler-release-1.26 for patch

[elankath]

What this PR does / why we need it: Syncs the autoscaler with upstream v1.26.2

Which issue(s) this PR fixes: Fixes #211

Special notes for your reviewer: NOTE: This fixes upstream autoscaler issue: https://github.com/kubernetes/autoscaler/issues/5372

Release note:

Synced the changes till v1.26.2 of upstream autoscaler release branch: cluster-autoscaler-release-1.26
Includes fix for https://github.com/kubernetes/autoscaler/issues/5372

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:white_check_mark: elankath
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:x: BigDarkClown
:x: towca
:x: gandhipr
:x: MaciekPytel
:x: jayantjain93
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[gardener-robot]

@elankath You need rebase this pull request with latest master branch. Please check.

[gardener-robot-ci-3]

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[elankath]

Integration tests now passing after re-vendoring to 1.26.1

...
Ran 11 of 11 Specs in 851.680 seconds
SUCCESS! -- 11 Passed | 0 Failed | 0 Pending | 0 Skipped

[elankath]

just one tiny change requested, o.w. all looks good

made changes mentioning upgrades in k8s.io packages in sync_changes. latest IT run passed.