TFT doesn't support recent versions of protobuf.

[tvalentyn]

TFT requires protobuf 5.x:

transform/setup.py

Line 51 in 339b0cb

'protobuf>=4.21.6,<6.0.0;python_version<"3.11"',

This conflicts with other GCP deps, for example recent version of grpcio-status requries protobuf 6.x. Furthermore, Protobuf 5.x reaches EOL in a couple of weeks: https://protobuf.dev/support/version-support/#python

This makes it complicated for projects to depend on TFT.

Could we ensure that TFT requirements are periodically updated to bump upper bounds for TFT dependencies? Thanks!