fix: skip matrix tests with fastdifferentiation

Author: gdalle

DifferentiationInterface/test/Back/SymbolicBackends/fastdifferentiation.jl

@@ -15,7 +15,13 @@ for backend in [AutoFastDifferentiation(), AutoSparse(AutoFastDifferentiation())
     @test check_inplace(backend)
 end
 
-test_differentiation(AutoFastDifferentiation(); logging=LOGGING);
+test_differentiation(
+    AutoFastDifferentiation(),
+    filter(default_scenarios()) do s
+        !(s.x isa Matrix) && !(s.y isa Matrix)
+    end;
+    logging=LOGGING,
+);
 
 test_differentiation(
     AutoSparse(AutoFastDifferentiation()),