[Feature Request] support protobuf 7

[ericbuehl]

Is your feature request related to a problem? Please describe.

temporalio is pinned below protobuf 7

Describe the solution you'd like

support protobuf 7

Additional context

https://github.com/temporalio/sdk-python/blob/main/pyproject.toml#L13

[glinc13]

I tried to bump the protobuf constraint to include version 7, but grpcio-tools also depends on protobuf and still pins it to <7, even in its latest stable release (1.81.0), which causes a dependency conflict.