rocDecode resize sample implementation (#285)

* WIP: resize kernels

* hipified kernels for scaling from cuda

* updated videodecodeRGB sample for scaling

* added stream parameter to kernels

* add scale kernels using tex2d and NN

* enable tex2D kernels

* add NN resize kernels

* fixed scaling kernels

* fixed tex2D scaling kernel for UV scaling

* minor formatting

* address review comments

---------

Co-authored-by: Aryan Salmanpour <aryan.salmanpour@amd.com>

[ROCm/rocdecode commit: 39e274d02d]

projects/rocdecode/utils/rocvideodecode/roc_video_dec.h

@@ -124,6 +124,10 @@ struct Rect {
     int bottom;
 };
 
+struct Dim {
+    int w, h;
+};
+
 static inline int align(int value, int alignment) {
    return (value + alignment - 1) & ~(alignment - 1);
 }