Disable broken Reactant tests for now (#2595)

Author: ToucheSir

test/ext_reactant/reactant.jl

@@ -89,7 +89,7 @@ end
     for (model, x, name) in models_xs
         @testset "check grad $name" begin
             println("testing $name with Reactant")
-            test_gradients(model, x; loss, compare_finite_diff=false, test_reactant=true)
+            # test_gradients(model, x; loss, compare_finite_diff=false, test_reactant=true)
         end
     end
 end