Update procfs to 0.18.0 (#17275)
## Summary
This brings various minor improvements described in
https://github.com/eminence/procfs/releases/tag/v0.18.0, avoids
duplicate rustix versions in Cargo.lock, and offers upstream the change
that we’re making in Fedora’s `uv` package to avoid shipping a
`rust-procfs0.17` compat package.
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## Test Plan
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`cargo nextest run -- --skip python_install_pyodide`
Co-authored-by: Charlie Marsh <charlie.r.marsh@gmail.com>
