Setup repository integration for sentry

Sentry repository integration allows Sentry to add context about which commits touched files/lines that raised an exception. It also improves deployment tracking (e.g. saying "this commit fixes this issue").

Docs: https://docs.sentry.io/workflow/releases/?platform=python

Migrated from T2161 (view on Phabricator)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information