Fix for Sundials 6.6 behavior changes #4346

Job	Run time
LLVM/Clang with Python 3.8	14m 5s
Build docs	8m 16s
Check example keywords	6s
Coverage	35m 42s
intel-oneAPI on Ubuntu, Python 3.8	21m 33s
intel-oneAPI classic on Ubuntu, Python 3.8	36m 47s
macOS with Python 3.8	23m 29s
macOS with Python 3.10	33m 33s
macOS with Python 3.11	19m 1s
Run MATLAB Test Script	10m 52s
Sundials 3 / fmt 7.1	15m 24s
Sundials 4 / fmt 8.1	16m 47s
Sundials 5.8 / fmt 9.1	10m 35s
Sundials 6.4.1 / fmt 10	15m 25s
Sundials 6.6 / fmt 10	11m 16s
Windows 2019, MSVC 14.2, Python 3.8	19m 33s
Windows 2019, MSVC 14.2, Python 3.10	19m 31s
Windows 2019, MSVC 14.2, Python 3.11	27m 21s
ubuntu-20.04 with Python 3.8	16m 55s
ubuntu-22.04 with Python 3.8	22m 46s
ubuntu-20.04 with Python 3.10	21m 4s
ubuntu-22.04 with Python 3.10	16m 35s
ubuntu-20.04 with Python 3.11	21m 51s
ubuntu-22.04 with Python 3.11	16m 48s
windows-2022, MSVC 14.1, Python 3.8, fmt 10	30m 27s
windows-2022, MSVC 14.1, Python 3.10, fmt 8.1	30m 22s
windows-2022, MSVC 14.1, Python 3.11, fmt 7.1	29m 40s
windows-2022, MSVC 14.3, Python 3.8, fmt 10	40m 1s
windows-2022, MSVC 14.3, Python 3.10, fmt 8.1	33m 45s
windows-2022, MSVC 14.3, Python 3.11, fmt 7.1	25m 0s
mingw on Windows, Python 3.10	24m 4s
Run Python 3.8 examples on ubuntu-20.04	14m 6s
Run Python 3.10 examples on ubuntu-20.04	18m 21s
Run Python 3.11 examples on ubuntu-20.04	15m 20s
Run Python 3.8 examples on ubuntu-22.04	10m 15s
Run Python 3.10 examples on ubuntu-22.04	7m 58s
Run Python 3.11 examples on ubuntu-22.04	9m 15s
.NET on ubuntu-22.04	1m 21s
.NET on windows-2022	7m 33s
.NET on macos-11	4m 33s
	12h 37m 16s

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