Add split optimisation to all methods

13 jobs for RemoveEntropicSRT in 141 minutes (queued for 1 second)
Name Stage Failure
minimal-windows Test
39.82s call     lbmpy_tests/[Stencil.D3Q15-polynomial]
36.95s call lbmpy_tests/[True-Method.MRT]
35.33s call lbmpy_tests/phasefield/
35.15s call lbmpy_tests/centeredcumulant/[PdfsToCentralMomentsByMatrix-Stencil.D3Q27]
=========================== short test summary info ===========================
FAILED lbmpy_tests/[Method.TRT_KBC_N4]
= 1 failed, 830 passed, 50 skipped, 317 deselected, 15 warnings in 6060.19s (1:41:00) =
Cleaning up project directory and file based variables
ERROR: Job failed: Process exited with status 1