Merge branch 'psj-accessibility-feature-tests' into 'master'

Add more specific guidelines on when to include accessibility checks

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/129609



Merged-by: Lorena Ciutacu <lciutacu@gitlab.com>
Approved-by: Lorena Ciutacu <lciutacu@gitlab.com>
Reviewed-by: Enrique Alcántara <ealcantara@gitlab.com>
Reviewed-by: Rahul Chanila <rchanila@gitlab.com>
Reviewed-by: Scott de Jonge <sdejonge@gitlab.com>
Co-authored-by: Suzanne Selhorn <sselhorn@gitlab.com>
Co-authored-by: psjakubowska <psedlak-jakubowska@gitlab.com>