Coverage does not gate merges, so move it off the metered
dsh-enterprise-ubuntu-24-04-32core-test pool onto the in-house
self-hosted pool (vm-backup label, 64-core).
Also switch the pnpm store cache path to ~ so it resolves under
both /home/runner (hosted) and self-hosted home directories.
Verified on the self-hosted pool: the full coverage job (including
prepare-ci-bubblewrap and the exhaustive suite) completed green in
~5 min.
Chinesezjc
bdff8573b6