Merge branch 'pb/475261/add-preloads-to-add-on-purchases-resolver' into 'master'

Add preloads to AddOnPurchasesResolver

Closes #475261

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/162232



Merged-by: Marcos Rocha <mrocha@gitlab.com>
Approved-by: Bishwa Hang Rai <bhrai@gitlab.com>
Approved-by: Marcos Rocha <mrocha@gitlab.com>
Reviewed-by: Bishwa Hang Rai <bhrai@gitlab.com>
Co-authored-by: Paulo Barros <pbarros@gitlab.com>