Merge branch 'eduardosanz/add-devise-partial-to-codeowners' into 'master'

Add two files to Authentication CODEOWNERS section

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/161564



Merged-by: Kati Paizee <kpaizee@gitlab.com>
Approved-by: Adil Farrukh <afarrukh@gitlab.com>
Approved-by: Kati Paizee <kpaizee@gitlab.com>
Co-authored-by: Eduardo Sanz García <esanz-garcia@gitlab.com>