Upload source-maps to sentry as part of release
Problem
We shut off source-map fetching on the frontend for security reasons.
This means that we get minified stack traces like https://sentry.gitlab.net/gitlab/customersgitlabcom/issues/2397046/?referrer=slack
Proposal
As part of our pipeline, upload source-maps to Sentry: https://docs.sentry.io/platforms/javascript/sourcemaps/
Result
Sentry reports have stack traces we can make sense of.