Merge branch 'issue_434281' into 'master'

Add getting help section to ClickHouse docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/140495



Merged-by: Lorena Ciutacu <lciutacu@gitlab.com>
Reviewed-by: Lorena Ciutacu <lciutacu@gitlab.com>
Co-authored-by: Felipe Artur <felipefac@gmail.com>