Tests

fix: only solve parameter initialization for `NonlinearSystem` #1060

Job	Run time
Tests (1, Downstream) / Tests - Downstream	10m 37s
Tests (1, Extended) / Tests - Extended	6m 33s
Tests (1, Extensions) / Tests - Extensions	17m 33s
Tests (1, Initialization) / Tests - Initialization	14m 24s
Tests (1, InterfaceI) / Tests - InterfaceI	24m 22s
Tests (1, InterfaceII) / Tests - InterfaceII	19m 38s
Tests (1, RegressionI) / Tests - RegressionI	3m 25s
Tests (1, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	7m 20s
Tests (lts, Downstream) / Tests - Downstream	12m 38s
Tests (lts, Extended) / Tests - Extended	9m 46s
Tests (lts, Extensions) / Tests - Extensions	22m 38s
Tests (lts, Initialization) / Tests - Initialization	16m 12s
Tests (lts, InterfaceI) / Tests - InterfaceI	23m 45s
Tests (lts, InterfaceII) / Tests - InterfaceII	19m 18s
Tests (lts, RegressionI) / Tests - RegressionI	7m 7s
Tests (lts, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	10m 24s
Tests (pre, Downstream) / Tests - Downstream	10m 36s
Tests (pre, Extended) / Tests - Extended	6m 29s
Tests (pre, Extensions) / Tests - Extensions	9m 4s
Tests (pre, Initialization) / Tests - Initialization	14m 7s
Tests (pre, InterfaceII) / Tests - InterfaceII	19m 16s
Tests (pre, InterfaceI) / Tests - InterfaceI	24m 44s
Tests (pre, RegressionI) / Tests - RegressionI	5m 45s
Tests (pre, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	7m 41s
	5h 23m 22s

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