convert example model to test cases, optional termination in dry cells #2183

Job	Run time
Build	1m 47s
Check format	2m 0s
Smoke test	5m 56s
NetCDF testing (ubuntu-22.04)	4m 59s
Extended testing (ubuntu-22.04)	18m 15s
Parallel testing (ubuntu-22.04)	34m 16s
Extended testing (macos-13)	55m 23s
NetCDF testing (macos-13)	8m 28s
Test GNU fortran (macos-13, false)	31m 14s
Parallel testing (macos-13)	1h 10m 10s
Parallel testing (windows-2022)	1h 36m 54s
NetCDF testing (windows-2022)	51m 41s
Test GNU fortran (macos-14, false)	25m 49s
Extended testing (windows-2022)	1h 57m 34s
Test GNU fortran (macos-14, true)	39m 6s
Test Intel fortran (ubuntu-22.04)	29m 22s
Test GNU fortran (ubuntu-22.04, false)	38m 24s
Test Intel fortran (macos-13)	39m 32s
Test GNU fortran (ubuntu-22.04, true)	1h 34m 48s
Test Intel fortran (windows-2022)	1h 9m 6s
Test GNU fortran (windows-2022, false)	35m 9s
	14h 29m 53s

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