Merge branch '377512-cablett-exclude-user-email-errors' into 'master'

Exclude user errors from email error metrics

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/102145



Merged-by: Tetiana Chupryna <tchupryna@gitlab.com>
Approved-by: John Hope <jhope@gitlab.com>
Approved-by: Tetiana Chupryna <tchupryna@gitlab.com>
Co-authored-by: charlie ablett <cablett@gitlab.com>