Fix settings paths for tests

[FreddieAkeroyd]

• Set new SIM value PV in DI tests
• Add missing galil setup files, also change some tests to use main instrument after deleting copies in Fix settings files EPICS-motorExtensions#87

See ISISComputingGroup/IBEX#8979

[FreddieAkeroyd]

could of cases i have ignored BLE001 but maybe could catch AssertionError | UnableToConnectToPVException if that covered things e.g. in cryosms?

[FreddieAkeroyd]

just rerunning a jenkins job as seen some AttributeError: type object 'datetime.datetime' has no attribute 'timezone'. Did you mean: 'astimezone'? in an earlier system test log. Feels like you might get this if you had done a from datetime import datetime rather than import datetime but i'd have thought ruff would have picked this up. Re-running as it was looking at a slightly older version of code, but I don't recall changing any datetime today.