gRPC is currently getting formatted with two different clang-format implementations, and due to some weirdness they have different include file orderings. This change introduces clang-format configuration to ensure that the two systems align - it's *highly* expected that this will need some maintenance going forward as the two systems evolve.
Closes#40905
PiperOrigin-RevId: 819606209
Corrects bazel run command in README.
It does not match the bazel command in the BUILD file.
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Closes#37664
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/37664 from nolasconapoleao:fix_interceptor_readme 42d828f2ec1423b8ced0b000532efabbc1af7fde
PiperOrigin-RevId: 686223940
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