Refine Sentry reporting, take 3

What does this MR do?

Further tunes our Sentry reporting to see if we can get more details for this report: https://sentry.gitlab.net/gitlab/gitlabcom-clientside/issues/2515997 [internal link]

Does this MR meet the acceptance criteria?

Conformity

• 📋 Does this MR need a changelog?
  • I have included a changelog entry.
  • I have not included a changelog entry because metrics + FF.
• Code review guidelines
• Merge request performance guidelines
• Style guides