Rollup merge of #132087 - ijchen:issue-131770-fix, r=dtolnay

Fix overly restrictive lifetime in `core::panic::Location::file` return type

Fixes #131770 by relaxing the lifetime to match what's stored in the struct. See that issue for more details and discussion.

Since this is a breaking change, I think a crater run is in order. Since this change should only have an effect at compile-time, I think just a check run is sufficient.

Author: jhpratt