gh-130419: Do not build the _freeze_module twice in case of Windows PGO builds

[chris-eibl]

Make the Windows PGO build slightly faster by not building the _freeze_module again in the PGUpdate phase.

I think this is a skip-news?

This will also speed up clang-cl PGO build time (#130090).

Using the same idea, all projects with SupportPGO=False could be built only once (mostly _test modules), but I think this is not worth the effort.

• Issue: Do not build the freeze module twice in case of Windows PGO builds #130419

[chris-eibl]

@zooba I think this is an easy one?

[zooba]

Should be easy, yes, but I'm running a test release to be sure.

[chris-eibl]

Yeah, always good to double check :)

[zooba]

My extra test was good, so this is okay to merge. GitHub appears to be unhappy about something today though, so my merge isn't going through. If someone else manages to get it to merge, then go ahead!