Add intel snapshot testing

### What is the feature/what would you like to discuss?

We currently only have GNU snapshots for our snapshot testing (null dycore, 2 timestep tests).

Eventually, we want to have intel tests as well, which will mean:
1. generating intel snapshots for each of the schemes we're testing (using the code mods in https://github.com/NCAR/CAM-SIMA_backups)
2. Creating new test cases that point to the intel snapshots
3. Adding tests to testlist_cam.xml

### Is there anyone in particular you want to be part of this conversation?

_No response_

### Will this change (regression test) answers?

No

### Will you be implementing this enhancement yourself?

Any Software Engineer can do this