feat: tortoiseTTS

[mudler]

Is your feature request related to a problem? Please describe.
We support rhaspy, bark and now vall-e-x (#1007). Another popular project is https://github.com/neonbjb/tortoise-tts

Describe the solution you'd like
A backend for tortoise tts

Describe alternatives you've considered

Additional context
Having support for tortoiseTTS too would help not only for users already using it, but allows also LocalAI to be a good benchmarking platform for all the solutions out there.

[mudler]

Also relevant: https://twitter.com/reach_vb/status/1702369875820212608?t=C96cnC9AF5O59bHJ-kIdyw&s=19

Looks like coqui brings tortoiseTTS on par with vall-e-x voice cloning capabilities. Maybe worth putting effort directly into that one.

[djmaze]

The recently released XTTS-v2 is even more exciting.

[balisujohn]

I have started work on tortoise.cpp, which might be of interest https://github.com/balisujohn/tortoise.cpp

[mudler]

#1489