Organize macro tests a bit more#143514

Merged

bors merged 2 commits intorust-lang:masterfrom

joshtriplett:macro-test-organization

Jul 6, 2025

Commits on Jul 5, 2025

Move macro tests in `parser` into `macro` directory
joshtriplett
committed

Commits on Jul 6, 2025

Rename tests named with `mbe` to use `macro` instead
joshtriplett
committed