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/initializer-struct.shader_test

@@ -0,0 +1,84 @@
+[pixel shader]
+struct stu
+{
+    int3 aaa;
+    float3 bbb;
+    int2 ccc;
+    float4 ddd;
+    int eee;
+};
+
+float4 main() : sv_target
+{
+    struct stu val =
+    {
+        11, 12, 13,
+        21, 22, 23,
+        31, 32,
+        41, 42, 43, 44,
+        51
+    };
+    return val.ddd;
+}
+
+[test]
+draw quad
+probe all rgba (41, 42, 43, 44)
+
+
+[pixel shader]
+struct stu
+{
+    int3 aaa;
+    float3 bbb[2];
+    int2 ccc;
+    float4 ddd[3][2];
+    int eee;
+};
+
+float4 main() : sv_target
+{
+    struct stu val =
+    {
+        11, 12, 13,
+        211, 212, 213, 221, 222, 223,
+        31, 32,
+        4111, 4112, 4113, 4114, 4121, 4122, 4123, 4124,
+        4211, 4212, 4213, 4214, 4221, 4222, 4223, 4224,
+        4311, 4312, 4313, 4314, 4321, 4322, 4323, 4324,
+        51
+    };
+    return val.ddd[2][0];
+}
+
+[test]
+draw quad
+probe all rgba (4311, 4312, 4313, 4314)
+
+
+[pixel shader]
+struct stu
+{
+    int3 aaa;
+    struct
+    {
+        float4 foo;
+        int2 bar;
+    } bbb[3];
+};
+
+float4 main() : sv_target
+{
+    struct stu val =
+    {
+        1, 2, 3,
+        11, 12, 13, 14, 15, 16,
+        21, 22, 23, 24, 25, 26,
+        31, 32, 33, 34, 35, 36
+    };
+    return val.bbb[1].foo;
+}
+
+[test]
+draw quad
+probe all rgba (21, 22, 23, 24)