chore(deps): bump grpcio to 1.72.0

[mudler]

Description

This pull request updates the grpcio library from version 1.71.0 to 1.72.0 across multiple Python backend requirement files to ensure consistency and take advantage of the latest fixes and improvements.

Dependency updates:

• Updated grpcio to version 1.72.0 in the following requirement files:
  • backend/python/bark/requirements.txt
  • backend/python/common/template/requirements.txt
  • backend/python/coqui/requirements.txt
  • backend/python/diffusers/requirements.txt
  • backend/python/exllama2/requirements.txt
  • backend/python/faster-whisper/requirements.txt
  • backend/python/kokoro/requirements.txt
  • backend/python/rerankers/requirements.txt
  • backend/python/transformers/requirements.txt
  • backend/python/vllm/requirements.txt

Notes for Reviewers

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