fix(chatterbox): install chatterbox-tts with --no-deps and pin runtime deps

The previous omegaconf pin only addressed one symptom of a deeper problem:
chatterbox-tts upstream depends on `russian-text-stresser` (unpinned git URL),
which transitively pins `spacy==3.6.*` and other ancient packages. That cascade
forces pip to backtrack through Jinja2/MarkupSafe/omegaconf into Python-2-era
sdists that no longer build (e.g. ruamel.yaml<0.15, Jinja2 2.6 importing the
long-removed `setuptools.Feature`).

Install chatterbox-tts itself with --no-deps in install.sh and list its real
runtime deps explicitly in each requirements-*.txt, dropping the optional
russian-text-stresser. This unblocks the darwin (and other) builds without
playing whack-a-mole on each newly-discovered transitive pin.

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Assisted-by: Claude:claude-opus-4-7 [Claude Code]