Fix tensorflow min version depending on Python version (#7045)

Author: albertvillanova

setup.py

@@ -176,7 +176,8 @@
     "sqlalchemy",
     "s3fs>=2021.11.1",  # aligned with fsspec[http]>=2021.11.1; test only on python 3.7 for now
     "protobuf<4.0.0",  # 4.0.0 breaks compatibility with tensorflow<2.12
-    "tensorflow>=2.6.0",  # Issue installing 2.16.0 with Python 3.8; we rely on other dependencies pinning numpy < 2
+    "tensorflow>=2.6.0; python_version<'3.10'",  # numpy-2 is not supported for Python < 3.10
+    "tensorflow>=2.16.0; python_version>='3.10'",  # Pins numpy < 2
     "tiktoken",
     "torch>=2.0.0",
     "soundfile>=0.12.1",