Adding integrated/external context to error tracking snowplow metrics

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/121259



Merged-by: Frédéric Caplette <fcaplette@gitlab.com>
Approved-by: Ankit Panchal <apanchal@gitlab.com>
Approved-by: Rutger Wessels <rwessels@gitlab.com>
Approved-by: Kassio Borges <kborges@gitlab.com>
Approved-by: Frédéric Caplette <fcaplette@gitlab.com>
Reviewed-by: Kassio Borges <kborges@gitlab.com>
Reviewed-by: Frédéric Caplette <fcaplette@gitlab.com>
Reviewed-by: Daniele Rossetti <drossetti@gitlab.com>
Reviewed-by: Ankit Panchal <apanchal@gitlab.com>
Co-authored-by: Daniele Rossetti <drossetti@gitlab.com>