Merge branch 'jp-cmd-specs' into 'master'

Use Chat class for real chat reqeusts

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/138046



Merged-by: Pavel Shutsin <pshutsin@gitlab.com>
Approved-by: Pavel Shutsin <pshutsin@gitlab.com>
Reviewed-by: Pavel Shutsin <pshutsin@gitlab.com>
Reviewed-by: Alexandru Croitor <acroitor@gitlab.com>
Co-authored-by: Jan Provaznik <jprovaznik@gitlab.com>