Deploy workflows must not restore a cache that other workflows can
write to. The pnpm store cache is removed from the api-doc and
styles-doc deploys; installs are slower but deploys are infrequent.
Also install with --frozen-lockfile in the three plugin deploys, as CI
already does by default, so a deploy never resolves dependencies that
differ from the lockfile.
Signed-off-by: David Barragán Merino <david.barragan@kaleidos.net>