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/asfloat.shader_test

@@ -0,0 +1,48 @@
+[require]
+shader model >= 4.0
+
+[pixel shader]
+float4 main(uniform float f, uniform int i, uniform uint u, uniform half h) : sv_target
+{
+    float4 ret;
+
+    ret.x = asfloat(f);
+    ret.y = asfloat(i);
+    ret.z = asfloat(u);
+    ret.w = asfloat(h);
+    return ret;
+}
+
+[test]
+uniform 0 float4 123.0 -2.0 456 0.01
+draw quad
+probe (320,240) rgba (123.0, -2.0, 456.0, 0.01)
+
+[pixel shader]
+float4 main(uniform float2x2 m, uniform float4 v) : sv_target
+{
+    return float4(asfloat(m)[0][1], asfloat(v).y, 0, 0);
+}
+
+[test]
+uniform 0 float4 11 12 0 0
+uniform 4 float4 13 14 0 0
+uniform 8 float4 20 21 22 23
+draw quad
+probe (320,240) rgba (13.0, 21.0, 0.0, 0.0)
+
+[pixel shader fail]
+float4 main() : sv_target
+{
+    bool b = true;
+
+    return asfloat(b);
+}
+
+[pixel shader fail]
+float4 main() : sv_target
+{
+    double d = 1.0;
+
+    return asfloat(d);
+}