Merge branch 'alvin-master-patch-ac5b' into 'master'

Add note for users unable to sign in with web auth when ldap linked

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/149517



Merged-by: Jon Glassman <jglassman@gitlab.com>
Approved-by: Jon Glassman <jglassman@gitlab.com>
Co-authored-by: Bogdan Denkovych <bdenkovych@gitlab.com>
Co-authored-by: Alvin Gounder <agounder@gitlab.com>