feat(gwt-ist): add nonlinear sorption isotherms to immobile domain (#… #3326

Job	Run time
Check format	2m 3s
Build	2m 1s
Smoke test	5m 53s
Parallel testing (ubuntu-22.04)	34m 23s
Test Intel fortran (ubuntu-22.04)	41m 24s
Parallel testing (macos-13)	1h 12m 3s
Extended executable testing (ubuntu-22.04)	17m 21s
Test Intel fortran (macos-12)	31m 51s
Test GNU fortran (macos-12, false)	26m 14s
Parallel testing (windows-2022)	53m 18s
Extended executable testing (macos-13)	46m 15s
Test Intel fortran (windows-2022)	36m 9s
Test GNU fortran (macos-14, false)	21m 16s
Test GNU fortran (macos-14, true)	33m 8s
Test GNU fortran (ubuntu-22.04, false)	37m 59s
Test GNU fortran (ubuntu-22.04, true)	1h 31m 47s
Test GNU fortran (windows-2022, false)	34m 55s
	9h 48m 0s

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