Detect superchain-registry changes affecting upgrade fork tests (OPCM - Upgrade 13)

_TODO: clean this up_

Changes to 'superchain-registry/superchain/configs/' which affect fork tests should be detected and sent alerts to #notify-ci-failures.

[Context](https://github.com/ethereum-optimism/optimism/pull/13323/files#r1876796143)

> A job that runs every few hours and tags us in #notify-ci-failures on slack seems like a good way to account for that
> Could add a CI job to make sure superchain registry commit is up to date

Start with the superchain-registry/superchain/configs/ path and read the linked context in PR 13323. Trace how upgrade fork tests consume registry changes and locate the existing CI entry point. Done means relevant changes are detected and an alert is sent to #notify-ci-failures.

Written by the indexing model from the issue text.