Merge branch '422037-remove-code-suggestions-pat-field' into 'master'

Remove PAT field for Code Suggestions: UI part

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/129493



Merged-by: Roy Zwambag <rzwambag@gitlab.com>
Approved-by: Ammar Alakkad <aalakkad@gitlab.com>
Approved-by: Nikola Milojevic <nmilojevic@gitlab.com>
Approved-by: Roy Zwambag <rzwambag@gitlab.com>
Co-authored-by: Aleksei Lipniagov <alipniagov@gitlab.com>