JIT: optimize the case of psq_l/psq_st where we know the actual GQR value

You would also need to `#include <array>`

Also the var decls would become:

```cpp
std::array<bool, 8> immediateGQR;
std::array<u32, 8> immediateGQRVal
```
Also the `for (u32 i = 0; i < 8; i++)` would become `for (size_t i = 0; i < immediateGQR.size(); i++)`

Outside of that, they function like normal arrays (only more type-safe/convenient)