Update transformers and FlatBuffers Go example grpc dependency pins (#33501)
## Description
- Update `transformers` requirement pins from `5.3.0` to `5.10.1` across
the Python transformer tooling and test `requirements.txt` manifests.
- Update `google.golang.org/grpc` to `v1.84.0` in the FlatBuffers Go
greeter example `go.mod` files
(`grpc/examples/go/greeter/{client,models,server}/go.mod`) via
`cmake/patches/flatbuffers/flatbuffers.patch`.
## Motivation and Context
Keep Python `transformers` and third-party Go module dependency
manifests up to date with recent patched releases.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>