tests: Move HLSL tests to a subdirectory.

Approved-by: Giovanni Mascellani (@giomasce)
Approved-by: Francisco Casas (@fcasas)
Approved-by: Henri Verbeet (@hverbeet)
Approved-by: Alexandre Julliard (@julliard)
Merge-Request: https://gitlab.winehq.org/wine/vkd3d/-/merge_requests/248

tests/hlsl/sign.shader_test

@@ -0,0 +1,91 @@
+[pixel shader]
+uniform float f;
+
+float4 main() : sv_target
+{
+    return sign(f);
+}
+
+[test]
+uniform 0 float4 1.0 0.0 0.0 0.0
+draw quad
+probe all rgba (1.0, 1.0, 1.0, 1.0)
+uniform 0 float4 -1.0 0.0 0.0 0.0
+draw quad
+probe all rgba (-1.0, -1.0, -1.0, -1.0)
+uniform 0 float4 0.0 0.0 0.0 0.0
+draw quad
+probe all rgba (0.0, 0.0, 0.0, 0.0)
+
+[pixel shader]
+uniform float4 f;
+
+float4 main() : sv_target
+{
+    return sign(f);
+}
+
+[test]
+uniform 0 float4 1.0 2.0 3.0 4.0
+draw quad
+probe all rgba (1.0, 1.0, 1.0, 1.0)
+
+[pixel shader]
+uniform float2x2 f;
+
+float4 main() : sv_target
+{
+    return sign(f);
+}
+
+[test]
+uniform 0 float4 1.0 2.0 0.0 0.0
+uniform 4 float4 3.0 4.0 0.0 0.0
+draw quad
+probe all rgba (1.0, 1.0, 1.0, 1.0)
+
+[pixel shader]
+uniform int f;
+
+float4 main() : sv_target
+{
+    return sign(f);
+}
+
+[test]
+uniform 0 int4 1 0 0 0
+draw quad
+probe all rgba (1, 1, 1, 1)
+uniform 0 int4 -1 0 0 0
+draw quad
+probe all rgba (-1, -1, -1, -1)
+uniform 0 int4 0 0 0 0
+draw quad
+probe all rgba (0, 0, 0, 0)
+
+[pixel shader]
+uniform int4 f;
+
+float4 main() : sv_target
+{
+    return sign(f);
+}
+
+[test]
+uniform 0 int4 1 2 3 4
+draw quad
+probe all rgba (1, 1, 1, 1)
+
+[pixel shader]
+uniform int2x2 f;
+
+float4 main() : sv_target
+{
+    return sign(f);
+}
+
+[test]
+uniform 0 int4 1 2 0 0
+uniform 4 int4 3 4 0 0
+draw quad
+probe all rgba (1, 1, 1, 1)