Fix redundant dependency invalidations

[RblSb]

Now after i update dependency file, build macro will not be called on every other module focus/save, only on actual dependency updates or macro module updates.

This let fake_modules seems like another leftover from #11482 (comment)

Also, i wonder if fake modules can be added with ~skip_postprocess:true there?

haxe/src/typing/macroContext.ml

Line 529 in d800964

add_dependency m (TypeloadCacheHook.create_fake_module ctx.com file) MDepFromMacro;

Closes #12846

[Simn]

Hmm, the question here is what happens with those in the cache. If they live on com then it would seem that they aren't available anymore after the current compilation finishes. I definitely agree with removing this global state, but we need to check if it's really correct like this.