Auto merge of #130246 - dianne:issue-97589-fix, r=petrochenkov

rustc_expand: remember module `#[path]`s during expansion

During invocation collection, if a module item parsed from a `#[path]` attribute needed a second pass after parsing, its path wouldn't get added to the file path stack, so cycle detection broke. This checks the `#[path]` in such cases, so that it gets added appropriately. I think it should work identically to the case for external modules that don't need a second pass, but I'm not 100% sure.

Fixes #97589

Author: bors