Auto merge of #150110 - Urgau:remap-relative-library, r=jieyouxu

Prefer remapping the relative `library/` and `compiler/` directories

This is done to avoid leaking the relative paths to the standard library after the overall of filenames in rust-lang/rust#149709.

Noted that the paths were already leaking before, but to a lesser extent since most (but not all) the paths embedded in the distributed `rlib` were absolute.

In general Cargo compiles workspace members with relative paths, so it's better anyway to remap the relative path.

In addition to our tests I have manually confirmed that it also works as expected for the printed diagnostics paths.

cf. 564093571
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bors 2025-12-19 11:45:11 +00:00
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