Turbopack: gracefully handle outputFileTracingIncludes matching a symlink (#97507)
Closes https://github.com/vercel/next.js/pull/96999
Make sure we don't do `.read().hash()` which is incorrect with symlinks.
Instead, hash the symlink itself instead of its target. This is what we
copy into the function source anyway
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Co-authored-by: vercel-fleet[bot] <308483924+vercel-fleet[bot]@users.noreply.github.com>
Co-authored-by: Tobias Koppers <1365881+sokra@users.noreply.github.com>