feat(kds): enable delta by default

[lahabana]

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) --

[lobkovilya]

Should we mention in UPGRADE.md that policies will be synced to the system namespace (instead of default namespace)? It shouldn't require any actions from the user to work, but the user may search policies in the wrong place after the upgrade

[slonka]

If we're setting something as default it shouldn't be called experimental.

Dismissing because of #8290 until we have a agreed upon way.