(internal) release_patch: build v6.12.1792

[DaedalusG]

Test plan: automated release PR, CI will perform additional checks

[sourcegraph-buildkite]

• 🟢 Internal release is ready for promotion!
• ⚠️ Do not close/merge that pull request or delete the associated branch if you intend to promote it.

[sourcegraph-buildkite]

• 🟢 Release has been promoted, see tag: https://github.com/sourcegraph/deploy-sourcegraph-docker/tree/v6.12.1792.
• ⛔ Do not under any circumstance delete the branch holding the tagged commit (i.e. release-v6.12.1792).
• ➡️ You can safely close that PR and delete its a associated branch.