The total scattering system test was made to read its own input file
instead of using the output of the focus test, so that the focus reference
file could be updated without breaking the total scattering test

The new cropping ranges meant that the intensity of peaks in
TotalScatteringTest was reduced, and the peak used for reference was at a
different index. It was decided that, since total scattering is at such
an early stage of development, it made most sense to just make the test
check for the new values instead

Refs #21294

Refs #21294

* Another test case must be added to ensure this can be done by looking at a saved file in the output directory

Refs #21294

Refs #21294

Refs #21294

The changes to make suffix more general mean that it can't be tested from
POLARIS unit tests any more, so a suffix has been added to the POLARIS
unit test as well

Refs #21214

Refs #21214

Refs #21229

Refs #21229

Refs #21229

Merge to ensure CrystalFieldFunction is available and up to date.