macOS's Finder/Spotlight can drop a fresh .DS_Store (or xattr) into a
directory while we're removing it, making rmSync throw ENOTEMPTY on the
first pass. That file is cosmetic garbage — retry the removal so the
race can't abort an otherwise-clean product build.
Salvaged from #123078 (its freshness.mjs hunk is subsumed by the broader
metadata skip; the unrelated CI-workflow deletions in that PR are not
included).
Co-Authored-By: dlshumway <85191357+dlshumway@users.noreply.github.com>
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