upgrade protobuf dependency to 3.21.4

[pgeler]

Specify library name and version:

continuation of #12079 and #12154

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• [x] I've read the guidelines for contributing.
• [x] I've followed the PEP8 style guides for Python code in the recipes.
• [x] I've used the latest Conan client version.
• [x] I've tried at least one configuration locally with the conan-center hook activated.

[conan-center-bot]

Failure in build 1 (edf25c56ca4b281d50608e3ba5b49ed748d366f7):

• grpc-proto/cci.20211106@: Error running command conan info grpc-proto/cci.20211106@#ea8dca93cfd4e39f51e92cafcc96d74c --json {jsonName} --dry-build -pr {profileName}:

  [settings]
  arch=x86_64
  build_type=Release
  compiler=gcc
  compiler.libcxx=libstdc++11
  compiler.version=7
  os=Linux
  [options]
  grpc-proto:shared=False
  
  ...
  WARN: googleapis/cci.20220711: requirement protobuf/3.21.1 overridden by grpc-proto/cci.20211106 to protobuf/3.21.4 
  ERROR: Conflict in googleapis/cci.20220711:
      'googleapis/cci.20220711' requires 'protobuf/3.21.1' while 'grpc-proto/cci.20211106' requires 'protobuf/3.21.4'.
      To fix this conflict you need to override the package 'protobuf' in your root package.
  

• grpc-proto/cci.20220627@: Didn't run or was cancelled before finishing

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^{Note: To save resources, CI tries to finish as soon as an error is found. For this reason you might find that not all the references have been launched or not all the configurations for a given reference. Also, take into account that we cannot guarantee the order of execution as it depends on CI workload and workers availability.}

[ericLemanissierBot]

I detected other pull requests that are modifying grpc-proto/all recipe:

• #12250

This message is automatically generated by https://github.com/ericLemanissier/conan-center-conflicting-prs so don't hesitate to report issues/improvements there.