Backfill SSL verification for existing CI integrations with known-good hostnames

Summary

Write a data migration to enable SSL verification on existing records for certain integrations with known-good hostnames:

• Integrations::DroneCi: cloud.drone.io
• Integrations::Teamcity: \A[^\.]+\.teamcity\.com\z

We already implemented this migration in https://gitlab.com/gitlab-org/security/gitlab/-/merge_requests/2043/diffs?commit_id=33596b7abbf1ae3545ba62690b1cc2a68f9189d3 for a security fix, but ended up handling this in the application since we're now discouraging migrations in security fixes (#349151, gitlab-org/release/docs!417 (merged)).

In the release after this migration is added, we can also remove the application code again in the Integrations::DroneCi and Integrations::Teamcity models.

Availability & Testing

• Unit tests for the associated MR already exist (already implemented) 💯
• There are existing tests around the migration