BREAKING CHANGE: Complete refactor to use controller-runtime

[mvaalexp]

:pencil: Description

• This is a complete refactor of the code to now use controller-runtime

:pencil: Customer Notes

• The endpoint has changed to /mutate-v1-pod for forward compatibility
• Everything should work identically to before

:heavy_check_mark: Checklist

• [x] Semantic Versioning present in commit message.

Semantic Versioning

1. fix(pencil): patches a bug (PATCH); e.g., fix(pencil): fixed a bug
2. feat(pencil): new feature (MINOR); e.g., feat(pencil): added a feature
3. BREAKING CHANGE/perf(pencil): footer BREAKING CHANGE:, breaking change (MAJOR); e.g., perf(pencil): api change