RT for older GPUs

## What problem does this solve or what need does it fill?

#19058 "Have a GPU that supports RT with inline ray queries"
Ray queries is used in compute shaders in order to implement hardware accelerated ray-triangle intersection tests. But what about software option? BVH building and traversal can be done in software.

## What solution would you like?

Add fallback in case of unsupported hardware detection or user selection in options.

## What alternative(s) have you considered?

Ignore, cause without dedicated hardware real-time performance is low for complex scenes and high rendering resolutions.