Merge branch 'emoji-picker-dropdown-migration' into 'master'

Emoji picker: Migrate dropdown to GlDisclosureDropdown

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/142201



Merged-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Approved-by: Annabel Dunstone Gray <annabel.dunstone@gmail.com>
Approved-by: Donald Cook <dcook@gitlab.com>
Approved-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Reviewed-by: Paul Gascou-Vaillancourt <pgascouvaillancourt@gitlab.com>
Reviewed-by: Sascha Eggenberger <seggenberger@gitlab.com>
Co-authored-by: Sascha Eggenberger <seggenberger@gitlab.com>