Cross correlate results from old Scancode with results from current Scancode to find regressions using Software Heritage licenses dump

## Short Description
Software Heritage has a dump of many license artifacts at .

All of these licenses were scanned with an earlier version of Scancode (assuming a version from early 2021). It might be useful to search this dataset for unknown licenses or possible exceptions or regressions in Scancode.

## Possible Labels

- new feature

## Select Category

- [ ] Enhancement
- [ ] Add License/Copyright
- [ ] Scan Feature
- [ ] Packaging
- [ ] Documentation
- [ ] Expand Support
- [X] Other