BED HOLDER (240mm) anycubic delta kossel linear plus

A remix of the bed holder to anycubic kossel with a 200mm bed to anycubic kossel linear plus with a 240mm bed

IMPORTANT:
Use the large version to make the third sujector, this have more scope to screws

2 versions:
- base_holder_240mm_8mm: Only one bed (Ex: heated bed)
- base_holder_240mm_12m: Two beds (Ex: Heated bed + glass bed)