Print a more descriptive / friendly msg when a render pass is unavailable

[iche033]

When a render pass is not registered / unavailable, the render pass system currently prints out an msg with the typeid name of the render pass. ,e.g.

RenderPass of typeid 'N2gz9rendering2v714DistortionPassE' is not registered

This looks more alarming than necessary. Consider printing out a more friendly name than typeid

Desired behavior

For the above example, it would be better to just say something like Distortion Pass is not supported for that particular render engine.

Implementation suggestion

Consider changing the macro to store a name other than typeid (which is what gets printed). This breaks current behavior so would need to go into main

Additional context

Related: #830 (comment)