GPU-AV: Add Shared Memory OOB checks

Basically catch case such as 

```glsl
shared uint x[4];

x[index] = 0;
```

which are not currently being detected

Since, unlike SSBO/UBO, shared memory is not "bound" we know anything declared is valid. We could make it simple at first and only check for Arrays and LongVectors having dynamic accesses OOB