Fixes # .

Summary/Motivation:

This resolves test failures we are currently seeing on Jenkins. AMPL Gurobi 12.0.3 returns all 0.0 values for duals for 4 problems (solved in presolve). The original suggestion of turning off presolve led to other test failures (and still partially incorrect duals).

This updates the tests to mark these as expected dual failures:

• LP_duals_maximize
• LP_duals_minimize
• LP_inactive_index
• QP_simple

Changes proposed in this PR:

• Mark expected dual test failures

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