1. Added script to install all dependencies then run all unit tests for python grpcio.
Closes#37070
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/37070 from sourabhsinghs:feature/developer-setup-script 954892f20a
PiperOrigin-RevId: 678718224
Change was created by the release automation script. See go/grpc-release.
Closes#37279
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/37279 from drfloob:bump_dev_version_202407222027 4e6607411e
PiperOrigin-RevId: 654925894
Change was created by the release automation script. See go/grpc-release.
Closes#36892
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36892 from XuanWang-Amos:bump_dev_version_202406112301 9b2898d716
PiperOrigin-RevId: 643027546
Implement Python CSM observability.
Design: [go/grpc-python-opentelemetry](http://goto.google.com/grpc-python-opentelemetry)
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Closes#36557
PiperOrigin-RevId: 639073741
Change was created by the release automation script. See go/grpc-release.
Closes#36544
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36544 from yashykt:bump_dev_version_202405061956 69ee5c869e
PiperOrigin-RevId: 631187829
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Closes#36333
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36333 from yijiem:bump_dev_version_202404101721 0a7cc5b4b7
PiperOrigin-RevId: 623878150
Change was created by the release automation script. See go/grpc-release.
Closes#35899
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/35899 from eugeneo:bump_dev_version_202402131133 73950425c9
PiperOrigin-RevId: 606777850
Change was created by the release automation script. See go/grpc-release.
Closes#35580
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/35580 from stanley-cheung:bump_dev_version_202401171835 b363888ca5
PiperOrigin-RevId: 599267642
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* Add grpcio-csds pacakge
* Remove unused file
* Fix the proto import path issue
* Update the CSDS package and xds-protos for PY2
* Make tests happy
* Fix Bazel proto dependency
* Add Python2 tests for CSDS