Add perspective video recording via Newton GL viewer for Kitless backends; Fix for Kitfull backends camera position

[bdilinila]

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[ooctipus]

I am still not super sure about the nested try catch here, maybe the first try catch could be somewhat reasonable, but inner case seem better to just fail the program rather than eat it and continue. My personal feeling is that both try catch should just fail immediately, which means user shouldn't be using --video flag at all for their setup.

[ooctipus]

it seems like the long term solution for this is to move _render_kit_perspective_rgb_array in physx folder. And move _try_init_gl_viewer to newton folder, expose them through CfgClass, then there will be no import issue, and you can just pick the right cfg at runtime and do cfg.classtype(cfg) to construct the rgb array of correct backend.