Merge branch 'ldap-u2f-fix' into 'master'

Fixed U2F authentication when used with LDAP

Closes #46661

See merge request gitlab-org/gitlab-ce!19115

app/assets/javascripts/pages/ldap/omniauth_callbacks/index.js

+import initU2F from '../../../shared/sessions/u2f';
+
+document.addEventListener('DOMContentLoaded', initU2F);

changelogs/unreleased/ldap-u2f-fix.yml

+---
+title: Fixed U2F login when used with LDAP
+merge_request:
+author:
+type: fixed