Summary: Parses annotated git tags into a versions that we write to the database.

Test Plan: Tested manually

Reviewers: michelle, #engineering

Reviewed By: michelle, #engineering

Differential Revision: https://phab.corp.pixielabs.ai/D2328

GitOrigin-RevId: 0dc5afc752c2bbd6c8d99bf3f0197b0c6f124c24