feat: enhanced array conversion and drop

[carlocorradini]

CReprOf and AsRust for arrays have been improved by eliminating the temporary vector using an array of MaybeUninit along with additional logic to prevent memory leaks.

CReprOf explicitly calls CDrop::do_drop on initialized items if an error occurs.
AsRust calls MaybeUninit::assume_init_drop on initialized items if an error occurs.
CDrop calls CDrop::do_dropon each element in the array, returning the first error encountered, if any.

PS: The code is inspired and adapted from sharksforarms/deku/src/impls/slice.rs, for which I’ve submitted PR sharksforarms/deku#601

[fredszaq]

Thanks a lot @carlocorradini ! This is waaaay better than what we had before !