tests/hlsl: Add some fx_4_0 state tests.

Approved-by: Nikolay Sivov (@nsivov)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1420

tests/hlsl/effect-pass-states-fx_4.shader_test

@@ -0,0 +1,29 @@
+[require]
+shader model >= 4.0
+shader model < 6.0
+
+% int and uint are compatible and generate no casts
+[effect todo]
+int stencil = 1;
+DepthStencilState depth {
+    DepthEnable = TRUE;
+};
+
+technique10 foo {
+    pass p0 {
+        SetDepthStencilState(depth, stencil);
+    }
+}
+
+% float to uint generates a cast
+[effect todo]
+float stencil = 1.0;
+DepthStencilState depth {
+    DepthEnable = TRUE;
+};
+
+technique10 foo {
+    pass p0 {
+        SetDepthStencilState(depth, stencil);
+    }
+}