Tests

refactor: significantly improve performance of `*Problem` generation #2230

Job	Run time
Tests (lts, Extended) / Tests - Extended	11m 35s
Tests (lts, Initialization) / Tests - Initialization	8m 57s
Tests (1, Extended) / Tests - Extended	19m 52s
Tests (1, Downstream) / Tests - Downstream	15m 31s
Tests (1, Extensions) / Tests - Extensions	48m 5s
Tests (pre, InterfaceI) / Tests - InterfaceI	41m 12s
Tests (pre, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	22m 44s
Tests (pre, FMI) / Tests - FMI	27m 0s
Tests (1, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	19m 42s
Tests (1, FMI) / Tests - FMI	26m 32s
Tests (pre, InterfaceII) / Tests - InterfaceII	52m 34s
Tests (lts, InterfaceI) / Tests - InterfaceI	22m 55s
Tests (pre, Extended) / Tests - Extended	20m 53s
Tests (pre, Initialization) / Tests - Initialization	18m 49s
Tests (pre, RegressionI) / Tests - RegressionI	17m 48s
Tests (1, InterfaceII) / Tests - InterfaceII	46m 47s
Tests (lts, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	11m 1s
Tests (1, InterfaceI) / Tests - InterfaceI	38m 42s
Tests (1, RegressionI) / Tests - RegressionI	16m 29s
Tests (lts, InterfaceII) / Tests - InterfaceII	31m 39s
Tests (lts, FMI) / Tests - FMI	16m 16s
Tests (1, Initialization) / Tests - Initialization	17m 19s
Tests (lts, Extensions) / Tests - Extensions	28m 51s
Tests (pre, Extensions) / Tests - Extensions	1h 16m 6s
Tests (lts, RegressionI) / Tests - RegressionI	7m 58s
Tests (lts, Downstream) / Tests - Downstream	7m 31s
Tests (pre, Downstream) / Tests - Downstream	17m 15s
	11h 30m 3s

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