mtr_t mtr_moved_t need renaming

[aconstlink]

Again I stumbled upon the _mtr_t and _mtr_moved_t ambiguity.

Whats needs to be differentiated is if a pointer

• is moved
• or copied

Somehow this needs better distinction. This could be like so:

some_class_mtr_shared_t // ownership needs addition
some_class_mtr_unique_t // ownership is transferred

So we need wrappers for both. Although this distinction is only required if both are passed to a function overload.

[aconstlink]

Implemented like described above. :recycle: