IMAT: Look at scripts

IMAT scripts currently do g.load script in the instrument scrips. This is bad for performance and other things. Can we help them do this better? They still want to know if there are errors in these scripts (which are loaded from the script drive) because they are developing them. They are aware of the risks of not being able to run of the network goes down.

### Acceptance Criteria

- Move g.load_scripts to imports in the inst folder

Locate g.load_scripts and the inst folder, then read how IMAT instrument scripts are currently loaded from the script drive. Confirm the intended import-based arrangement still reports script errors during development, and verify that g.load_scripts has been moved into imports in inst.

Scritto dal modello di indicizzazione a partire dal testo della issue.