fix(k8s): reenable deep copies when interacting with k8s resources

[michaelbeaumont]

Closes #8160

This was enabled in some form in #1113 and then in its current form in #6809

This is of course more correct but the performance implications are not 100% clear.

Checklist prior to review

• Link to relevant issue as well as docs and UI issues --
• This will not break child repos: it doesn't hardcode values (.e.g "kumahq" as a image registry) and it will work on Windows, system specific functions like syscall.Mkfifo have equivalent implementation on the other OS --
• Tests (Unit test, E2E tests, manual test on universal and k8s) --
  • Don't forget ci/ labels to run additional/fewer tests
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? (this GH action will add "backport" label based on these file globs, if you want to prevent it from adding the "backport" label use no-backport-autolabel label) --

[jakubdyszkiewicz]

Let's merge it and check the result of mesh-perf