Pass input types to mesh

[ffreyer]

For MakieOrg/Makie.jl#2573

Adjusts mesh generating functions to keep the input element type around, rather than converting to Float32

[SimonDanisch]

So, these kind of methods were written specifically to convert to OpenGL datatypes by default.
If one doesn't want them, the mesh should just be created with mesh(...) or Mesh(...) directly...

[ffreyer]

Sounds like they should be gl_normal_mesh etc then... But I can also change the default conversions in Makie I guess