Implement EF Core helpers for patch operations

[hippiehunter]

Patch operations are special, as long as the field in question hasn't changed the user may want to still apply the patch even though the GRFA has changed. This is operation specific (add, subtract are different than replace) behavior and it should be controlled by explicit calls or settings.

Aha! Link: https://synergex.aha.io/features/HC-94