Bump k8s.io/client-go from 0.26.2 to 0.26.3

Bumps k8s.io/client-go from 0.26.2 to 0.26.3.

Commits

• 8cbca74 Update dependencies to v0.26.3 tag
• 87720b3 Merge pull request #116437seans3/automated-cherry-pick-of-#116145#1158...
• fc13749 Removes old discovery hack ignoring 403 and 404
• f39ba12 Plumb stale GroupVersions through aggregated discovery
• f538edf Merge pull request #116352seans3/automated-cherry-pick-of-#115978
• 5dbbc58 Tolerate empty discovery response in memcache client
• See full diff in compare view

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