Deprecate VK_HEADER_VERSION 135 Ray Tracing functionality and clean up code!

In a few months time, just deprecate all previous Ray Tracing code (i.e. the original NVIDIA version and also the `VK_KHR_ray_tracing` beta version from header version `135`)

Only support official `VK_KHR_ray_tracing` which was introduced with header version `162`.

=> Search for all
```
#if VK_HEADER_VERSION >= 162
#else 
#endif
```
patterns and delete all the `#else` branches!