feat(policy): ability to skip default policies

[johnharris85]

Checklist prior to review

Fixes #3346

• 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) --
• Do you need to update UPGRADE.md? --
• Does it need to be backported according to the backporting policy? --
• Do you need to explicitly set a > Changelog: entry here or add a ci/ label to run fewer/more tests?

Changelog: feat(mesh): allow disabling default policy creation

[slonka]

@johnharris85 made the build step pass, hope you don't mind (you need to run make check before pushing, also if you do mind I won't push to your branches again). Review-wise I agree with Jakub.

[johnharris85]

All comments addressed :)