Merge branch 'bastirehm-move-event-tracking-docs' into 'master'

Move event tracking docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/132784



Merged-by: Suzanne Selhorn <sselhorn@gitlab.com>
Approved-by: Tanuja Jayarama Raju <tjayaramaraju@gitlab.com>
Approved-by: Ankit Panchal <apanchal@gitlab.com>
Reviewed-by: Marcin Sedlak-Jakubowski <msedlakjakubowski@gitlab.com>
Reviewed-by: Ankit Panchal <apanchal@gitlab.com>
Co-authored-by: Sebastian Rehm <srehm@gitlab.com>
Co-authored-by: Marcin Sedlak-Jakubowski <msedlakjakubowski@gitlab.com>
Co-authored-by: Ankit Panchal <apanchal@gitlab.com>