tests/hlsl: Add a test for copy-propagation of uniform texture object writes.

Approved-by: Francisco Casas (@fcasas)
Approved-by: Elizabeth Figura (@zfigura)
Approved-by: Henri Verbeet (@hverbeet)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/1436

tests/hlsl/hard-copy-prop.shader_test

@@ -223,3 +223,19 @@ float4 main() : sv_target
 uniform 0 float 11.0
 todo(sm<4) draw quad
 probe (0, 0) rgba(1, 2, 3, 5)
+
+[require]
+shader model < 5.1
+options: backcompat
+
+[pixel shader]
+sampler s;
+Texture2D t1, t2;
+
+float4 main() : sv_target
+{
+    Texture2D t = t1;
+    t1 = t2;
+    t2 = t;
+    return t1.Sample(s, float2(0, 0)) + t2.Sample(s, float2(0, 0));
+}