Merge branch 'ph/aiActionsTooltip' into 'master'

Added tooltip and aria-label to AI actions dropdown toggle

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/126184



Merged-by: Frédéric Caplette <fcaplette@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Minahil Nichols <minahilnichols@gitlab.com>
Approved-by: Frédéric Caplette <fcaplette@gitlab.com>
Co-authored-by: Phil Hughes <me@iamphill.com>