[Feature] Use shared memory from the GPU

[NickAcPT]

Description

Since I'm using a laptop, my GPU (GTX 1050) has both dedicated memory (4 GB) and shared memory (it depends on the system's RAM).

The idea behind this request is that sometimes I get an OOM because it only has 4 GB of ram that get used.
Thus, it would be awesome to have spleeter use the whole RAM that's available.

[aidv]

I think, but not sure, that that's out of devs control.
I assume it has to be a Tensorflow thing rather than a Spleeter thing.

[aidv]

Maybe @mmoussallam can confirm? :)