HLSL RWByteAddressBuffer templeted load/store is not supported

Consider the HLSL shader:
```
struct s
{
uint a;
float b;
};

void main()
{
RWByteAddressBuffer buffer;
uint offset = 0;

buffer.Load(offset);
}
```
Glslang gives `ERROR: test.comp.hlsl:12: 'Load' : no such field in structure`.

The issue provides a minimal HLSL example in test.comp.hlsl but names no repository source file or test. Start by reproducing the reported glslang error, then trace the HLSL front end's handling of RWByteAddressBuffer Load and Store templates. Done means the example is accepted and coverage verifies templated load/store behavior.

Written by the indexing model from the issue text.