Double check buffer_view and buffer_view_descriptor bindings

[johannesugb]

There has been some refactoring w.r.t. the binding of buffer_views:

• class buffer_view_descriptor was introduced
• as_uniform_texel_buffer and as_storage_texel_buffer has been removed from buffer
• as_uniform_texel_buffer_view and as_storage_texel_buffer_view have been added to buffer_view
• as_uniform_texel_buffer_views and as_storage_texel_buffer_views have been adapted accordingly, and so has been struct binding_data and all associated functions/methods.

It is a bit unclear if the structure is flawless/faultless.

Double check the actual descriptor infos that are written, where the data is stored, how the data is gathered, and if the vk::BufferView bindings are created properly.

This can best be investigated in the "ray_tracing_triangle_meshes" examples, because it uses buffer_views. See if everything still works, then bind explicitly using as_uniform_texel_buffer_views and also try to bind as_storage_texel_buffer_views (that will need some adaption in shaders).