Merge pull request #28578 from thockin/dont-checkin-generated-code-prep-1

Automatic merge from submit-queue

Prep for not checking in generated, part 1/2

This PR is extracted from #25978 - it is just the deep-copy related parts.  All the Makefile and conversion stuff is excluded.

@wojtek-t this is literally branched, a bunch of commits deleted, and a very small number of manual fixups applied.  If you think this is easier to review (and if it passes CI) you can feel free to go over it again. I will follow this with a conversion-related PR to build on this.

Or if you prefer, just close this and let the mega-PR ride.

@lavalamp

hack/verify-flags/known-flags.txt

@@ -35,6 +35,7 @@ bench-workers
 bind-address
 bind-pods-burst
 bind-pods-qps
+bounding-dirs
 build-only
 build-services
 build-tag
@@ -339,6 +340,7 @@ out-version
 outofdisk-transition-frequency
 output-base
 output-directory
+output-file-base
 output-package
 output-print-type
 output-version