Release v13.19.0

In CHANGELOG:

- Don't finish the opentracing span early !466
- gitlab-sshd: Respect the ssl_cert_dir config !467
- Stop changing directory to the filesystem root !470
- Fix opentracing setup for gitlab-sshd !473

Not in CHANGELOG:

Update LabKit to v1.4.0
Respect parent context for Gitaly calls
Add acceptance test for personal_access_token command
Acceptance tests for 2fa_recovery_codes, 2fa_verify, and git-lfs-authenticate
Specify the working version for lsif-go image
fix: upgrade of the labkit dependency
Add first Gitaly acceptance test
Add acceptance test for git-upload-archive
Unit test wrong channel type
fix: upgrade of the gitaly dependency
Add acceptance test for git-upload-pack