microVU: Ignore MAC flags in block match if not required

[JordanTheToaster]

Description of Changes

Ignores MAC flags in block match if they are not required.

Rationale behind Changes

Smaller block sizes likely meaning less stuttering and better performance in some cases.

Suggested Testing Steps

Test a large amount of games to make sure nothing breaks.

Did you use AI to help find, test, or implement this issue or feature?

No