Tests

test: remove reliance on old `examples/` models #1814

Job	Run time
Tests (1, Downstream) / Tests - Downstream	25m 32s
Tests (1, Extended) / Tests - Extended	18m 57s
Tests (1, Extensions) / Tests - Extensions	40m 55s
Tests (1, FMI) / Tests - FMI	25m 55s
Tests (1, Initialization) / Tests - Initialization	30m 53s
Tests (1, InterfaceI) / Tests - InterfaceI	41m 36s
Tests (1, InterfaceII) / Tests - InterfaceII	55m 41s
Tests (1, RegressionI) / Tests - RegressionI	15m 49s
Tests (1, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	20m 33s
Tests (lts, Downstream) / Tests - Downstream	16m 28s
Tests (lts, Extended) / Tests - Extended	11m 10s
Tests (lts, Extensions) / Tests - Extensions	25m 43s
Tests (lts, FMI) / Tests - FMI	17m 8s
Tests (lts, Initialization) / Tests - Initialization	22m 43s
Tests (lts, InterfaceI) / Tests - InterfaceI	30m 48s
Tests (lts, InterfaceII) / Tests - InterfaceII	53m 23s
Tests (lts, RegressionI) / Tests - RegressionI	7m 36s
Tests (lts, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	12m 2s
Tests (pre, Downstream) / Tests - Downstream	14m 44s
Tests (pre, Extended) / Tests - Extended	14m 18s
Tests (pre, Extensions) / Tests - Extensions	15m 47s
Tests (pre, FMI) / Tests - FMI	14m 56s
Tests (pre, Initialization) / Tests - Initialization	14m 13s
Tests (pre, InterfaceI) / Tests - InterfaceI	14m 35s
Tests (pre, InterfaceII) / Tests - InterfaceII	14m 53s
Tests (pre, RegressionI) / Tests - RegressionI	15m 2s
Tests (pre, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	14m 22s
	10h 5m 42s

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