Reverted Ender3 Camera holder

Reverted the cam support so that it is easier to see the nozzle.

Update 06/09/2024:

Cam and light support(2).stl
* clearance for printer head, especially with BLtouch
* X axis mount 1mm shorter : no wobbling anymore
* X axis mount right side 2mm higher, no wobbling anymore
* Can support around 1cm upper, to better see nozzle and not bed border

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reverted_cam_support.stl: just reverted the cam support
reverted_cam_blt_support.stl: reverted the support, add a bit of clearance for bl-touch and a generic support from [here](https://www.thingiverse.com/thing:5406856).