Commit 6eedf828b removed the ['.'] fallback for workspacePackagePatterns
when pnpm-workspace.yaml has no packages field. This caused findPackages
to default to ['.', '**'], discovering ALL directories with package.json
as workspace projects. This is the same regression that was previously
reverted in 595cd414f (close#10571), reintroduced by #10127.
Projects like cdxgen that use pnpm-workspace.yaml only for settings
(e.g. minimumReleaseAge) without a packages field were broken because
test data directories were picked up as workspace projects.
close#10909