Merge branch '409875-show-holt-winters-forecast' into 'master'

Show Holt-Winters forecast for Deployment Frequency

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/125849



Merged-by: Miguel Rincon <mrincon@gitlab.com>
Approved-by: Austin Regnery <aregnery@gitlab.com>
Approved-by: Alex Pennells <apennells@gitlab.com>
Approved-by: Miguel Rincon <mrincon@gitlab.com>
Approved-by: Furkan Ayhan <furkanayhn@gmail.com>
Reviewed-by: Miguel Rincon <mrincon@gitlab.com>
Reviewed-by: Ezekiel Kigbo <3397881-ekigbo@users.noreply.gitlab.com>
Reviewed-by: Alex Pennells <apennells@gitlab.com>
Co-authored-by: Ezekiel Kigbo <ekigbo@gitlab.com>