Tests

feat: add `LinearProblem` codegen #2153

Job	Run time
Tests (1, Downstream) / Tests - Downstream	20s
Tests (pre, Extended) / Tests - Extended	1s
Tests (pre, InterfaceI) / Tests - InterfaceI	1s
Tests (lts, Extensions) / Tests - Extensions	20s
Tests (pre, FMI) / Tests - FMI	21s
Tests (pre, Extensions) / Tests - Extensions	1s
Tests (1, InterfaceI) / Tests - InterfaceI	1s
Tests (lts, Downstream) / Tests - Downstream	1s
Tests (1, RegressionI) / Tests - RegressionI	1s
Tests (lts, Extended) / Tests - Extended	20s
Tests (lts, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	20s
Tests (1, Extended) / Tests - Extended	1s
Tests (pre, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	20s
Tests (pre, InterfaceII) / Tests - InterfaceII	1s
Tests (1, Initialization) / Tests - Initialization	1s
Tests (1, Extensions) / Tests - Extensions	1s
Tests (pre, Initialization) / Tests - Initialization	1s
Tests (1, InterfaceII) / Tests - InterfaceII	1s
Tests (1, FMI) / Tests - FMI	20s
Tests (pre, RegressionI) / Tests - RegressionI	21s
Tests (pre, Downstream) / Tests - Downstream	20s
Tests (lts, InterfaceI) / Tests - InterfaceI	1s
Tests (lts, FMI) / Tests - FMI	20s
Tests (1, SymbolicIndexingInterface) / Tests - SymbolicIndexingInterface	1s
Tests (lts, RegressionI) / Tests - RegressionI	1s
Tests (lts, InterfaceII) / Tests - InterfaceII	1s
Tests (lts, Initialization) / Tests - Initialization	1s
	3m 39s

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