Protobuf v5 support

[Tradias]

Is your feature request related to a problem? (你需要的功能是否与某个问题有关?)

The brpc vcpkg port depends on protobuf. Since vcpkg maintains a single-version scheme, updating protobuf requires brpc to support it.

Describe the solution you'd like (描述你期望的解决方法)

Protobuf v5 support. V4 support can be broken in the process.

Describe alternatives you've considered (描述你想到的折衷方案)

Patching brpc, see https://github.com/microsoft/vcpkg/blob/052b06a95da4cee184bab4422e02e7f316055a99/ports/brpc/protobuf.patch

Additional context/screenshots (更多上下文/截图)

[chenBright]

cc @wasphin

[wasphin]

Just missed this, will try it this weekend, thanks.