Move all model-specific info out of workbench #3540

Job	Run time
Check for syntax errors	12s
Check HISTORY RST syntax	11s
Run model tests (3.8, windows-latest)	9m 50s
Run model tests (3.8, macos-latest)	5m 31s
Check sdist (3.8, windows-latest)	3m 3s
Run model tests (3.9, windows-latest)	9m 46s
Build binaries (macos-latest)	19m 31s
Check sdist (3.8, macos-latest)	2m 0s
Build binaries (windows-latest)	13m 56s
Run Workbench Tests (windows-latest)	4m 14s
Run model tests (3.9, macos-latest)	5m 36s
Check sdist (3.9, windows-latest)	4m 38s
Run Workbench Tests (macos-latest)	2m 42s
Run model tests (3.10, windows-latest)	8m 14s
Check sdist (3.9, macos-latest)	1m 48s
Run model tests (3.10, macos-latest)	5m 13s
Check sdist (3.10, windows-latest)	4m 32s
Validate Sampledata & User Guide	7m 21s
Run model tests (3.11, windows-latest)	8m 2s
Check sdist (3.10, macos-latest)	2m 28s
Run model tests (3.11, macos-latest)	5m 6s
Check sdist (3.11, windows-latest)	3m 30s
Build sampledata archives	4m 54s
Check sdist (3.11, macos-latest)	1m 56s
	2h 14m 14s

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