fix PHP distribtest on monterey (grpc#31567) (grpc#31702)

Co-authored-by: Jan Tattermusch <jtattermusch@google.com>

Bump v1.51.x to 1.51.1 (grpc#31740)

* Bump to 1.51.1

* Regenerate projects

Bump v1.51.x to v1.51.0 (grpc#31705)

* bump version to 1.51.0

* regenerate projects

Bump v1.51.x to 1.51.0-pre1 (grpc#31622)

* bump version to 1.51.0-pre1

* regenerate projects

fix objc bazel tests on python3.9 (grpc#31410)

Fix python tests on kokoro macos monterey (grpc#31126) (grpc#31315)

* fix python build on kokoro macos monterey

* avoid using realpath

* fix grpc_distribtests_python on macos monterey

* try upgrade setuptools

Co-authored-by: Jan Tattermusch <jtattermusch@google.com>

Bump release version v1.50.0-pre1 (grpc#31175)

* bump version to 1.50.0-pre1

* regenerate projects

Re-add compiler protos to grpcio-tools (grpc#31062) (grpc#31078)

* Re-add compiler protos to grpcio-tools

* Attempt to break

* Actually fail if protobufs don't compile. Who wrote this thing?

* Add an actual test

* yapf

* Whoops. Thought I'd reverted you

* Please the formatter gods

Bump v1.46.x to v1.46.5 (grpc#31050)

* bump version to 1.46.5

* regenerate projects

* Automated change: Fix sanity tests

Co-authored-by: gnossen <gnossen@users.noreply.github.com>

Bump v1.48.x to v1.48.2 (grpc#31039)

* bump version to 1.48.2

* regenerate projects