Fix 18973, 9161 - TypeInfo generation does not account for @disable

[Geod24]

This changes `overloadExactMatch` as all 14 usages of it are to find
functions that can later be called.

[dlang-bot]

Thanks for your pull request, @Geod24!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	9161	normal	Linker error on linux if struct has @disabled ~this();
✓	18973	minor	@disable on const toHash causes unresolved symbol error

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + dmd#14272"

[Geod24]

While looking at issues (I originally encountered this when working on a library), I also saw 9161 - Added a fix for it as well.