Merge branch '391730-remove-duplicate-product-planning-metrics' into 'master'

Mark duplicate metrics for group product planning removed

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/150311



Merged-by: Niko Belokolodov <nbelokolodov@gitlab.com>
Approved-by: Niko Belokolodov <nbelokolodov@gitlab.com>
Co-authored-by: Sebastian Rehm <srehm@gitlab.com>