Test model diagnostics using multiple AMPL SCIP versions #6184

Job	Run time
Check Spelling	6s
Check code formatting (Black)	30s
Compatibility tests	5m 29s
Build Sphinx docs	4m 0s
pytest (py3.8/linux)	2m 16s
Pylint	3m 58s
pytest (py3.8/win64)	8m 43s
pytest (py3.9/linux)	2m 11s
pytest (py3.9/win64)	8m 5s
pytest (py3.10/linux)	2m 23s
pytest (py3.10/win64)	9m 39s
pytest (py3.11/linux)	2m 57s
pytest (py3.11/win64)	8m 53s
pytest (py3.12/linux)	2m 28s
pytest (py3.12/win64)	7m 27s
Upload coverage report (Codecov) (linux)	11s
Upload coverage report (Codecov) (win64)	11s
	1h 9m 27s

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