- Added check of units for all tested Nexus entries
- Used try catch to differentiate between the two supported Nexus versions (else loader throws "Unknown property seach object ...")
- Added unit tests for new Nexus file (test data not yet uploaded -> need to be fixed later)
- Added tests for new distance fields which fail (unclear yet if this is an implementation error (likely) or an error in Nexus file)

Refs #21907