Refs #23238 : Trying to fix failed OSX build

BeamlineTest.ComponentInfoTest.test_merge_identical_interval_when_rotations_differ was now failing
since we changed `ComponentInfo::buildMergeIndices()` to check identical intervals over the entire range
of `size()` and not just `nonDetectorSize()`.

2 new tests have been added that detect the difference between these two ranges: they fail if we
only check up to `nonDetectorSize()`