Merge branch '338816-simplify-sentry-boot' into 'master'

Refactor Sentry initialization

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/129471



Merged-by: Andrew Fontaine <afontaine@gitlab.com>
Approved-by: Andrew Fontaine <afontaine@gitlab.com>
Approved-by: Ross Byrne <robyrne@gitlab.com>
Reviewed-by: Andrew Fontaine <afontaine@gitlab.com>
Co-authored-by: Miguel Rincon <mrincon@gitlab.com>