Resolve "ee_compat_check should remove `ce-` prefix or `-ce` suffix as ee-specific check"

What does this MR do?

Resolve "ee_compat_check should remove ce- prefix or -ce suffix as ee-specific check"

Are there points in the code the reviewer needs to double check?

We might want to share more codes between EeCompatCheck and EESpecificCheck, but... 🤷🏻

Why was this MR needed?

When we create EE branch first, we cannot add ee- to the existing merge request. In this case we often just add ce- to the CE branch.

Does this MR meet the acceptance criteria?

• Documentation created/updated
• Tests added for this feature/bug
• Conform by the code review guidelines
  • Has been reviewed by a Backend maintainer

What are the relevant issue numbers?

Closes #46519 (closed)