Rollup merge of #137758 - jdonszelmann:fix-137662, r=nnethercote

fix usage of ty decl macro fragments in attributes

See the test case. Due to one missing code path (and also the changes in #137517), using $ty or other specific fragments as part of an attr wouldn't work. $tt used to work since it wouldn't be parsed anywhere along the way.

Closes #137662

Author: compiler-errors