fix: recurse into subdirectories when parsing conformance output

parseOutputDir only read one level deep, so scenarios with '/' in their
name (e.g. auth/metadata-default) were stored in nested subdirectories
and never found. This caused tier-check to report 4/23 client conformance
when the actual pass rate was 23/23.

Also removes accidentally committed pnpm-lock.yaml.

Author: felixweinberger