fix(chatterbox): pin cublas12 torch/transformers and setuptools so the backend loads (fixes #11070) (#11074)

fix(chatterbox): pin cublas12 torch/transformers and setuptools so the backend loads

The cuda12-chatterbox gallery backend fails to load on a fresh install
because several deps in requirements-cublas12.txt are unpinned:

- torch/torchaudio: unlike requirements-cublas13.txt and
  requirements-cpu.txt, this file has no --extra-index-url, so pip pulls
  a wheel whose CUDA runtime (cu130) is newer than the host driver
  supports ("NVIDIA driver on your system is too old"). Add the cu124
  index and pin torch/torchaudio 2.6.0+cu124.
- transformers: resolves to 5.x, which dropped LlamaConfig.rope_theta
  that chatterbox-tts 0.3.1's T3 config still reads. Cap to <5.
- setuptools: 81+ dropped pkg_resources, which perth imports under a
  bare try/except and silently sets PerthImplicitWatermarker=None,
  making ChatterboxTTS.__init__ raise 'NoneType' object is not callable.
  Cap to <81 in requirements.txt.

Fixes #11070

Signed-off-by: Tai An <antai12232931@anaiguo.com>
Co-authored-by: Tai An <antai12232931@anaiguo.com>
Co-authored-by: localai-org-maint-bot <bot-opensource@localaisrl.com>

backend/python/chatterbox/requirements-cublas12.txt

@@ -1,6 +1,7 @@
-torch
-torchaudio
-transformers
+--extra-index-url https://download.pytorch.org/whl/cu124
+torch==2.6.0+cu124
+torchaudio==2.6.0+cu124
+transformers<5
 numpy>=1.24.0,<1.26.0
 # chatterbox-tts itself is installed with --no-deps in install.sh.
 # These are its real runtime deps, mirroring upstream's pyproject.toml
@@ -15,4 +16,4 @@ conformer
 safetensors
 spacy-pkuseg
 pykakasi==2.3.0
-accelerate
+accelerate

backend/python/chatterbox/requirements.txt

@@ -2,5 +2,5 @@ grpcio==1.71.0
 protobuf
 certifi
 packaging
-setuptools
+setuptools<81
 poetry