Merge branch 'add-description-to-graphql-member-entity' into 'master'

Add description field to the MemberEntity

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/142900



Merged-by: Gabriel Mazetto <brodock@gmail.com>
Approved-by: Gabriel Mazetto <brodock@gmail.com>
Approved-by: David Dieulivol <ddieulivol@gitlab.com>
Co-authored-by: Alex Buijs <abuijs@gitlab.com>