Intended only for 2.9x, this cleans up the following to reduce confusion and unused files
- Removes bl_mesh_modifiers.py test (it's outdated, has been superseded by modifiers.py, and hasn't been run as part of ctest for quite some time already)
- Removes the old `object_modifier_array` test and adds it to the modifiers.py script (easier to maintain)
Note for SVN: The following file can be removed from the test SVN trunk at the same time as this commit as long as 2.83 LTS testing targets the correct SVN tag (I think it would, but not sure):
- Remove `.../tests/modifier_stack/array_test.blend`
Replace `.../tests/modeling/modifiers.blend` with this new file: