[asio-grpc] new port

[Tradias]

Describe the pull request

• Which triplets are supported/not supported? Have you updated the CI baseline?

  all, Yes

• Does your PR follow the maintainer guide?

  Yes

• If you have added/updated a port: Have you run ./vcpkg x-add-version --all and committed the result?

  Yes

If you are still working on the PR, open it as a Draft: https://github.blog/2019-02-14-introducing-draft-pull-requests/

[ghost]

All CLA requirements met.

[github-actions]

You have modified or added at least one portfile where deprecated functions are used.

If you feel able to do so, please consider migrating them to the new functions:
vcpkg_install_cmake -> vcpkg_cmake_install (from port vcpkg-cmake)
vcpkg_build_cmake -> vcpkg_cmake_build (from port vcpkg-cmake)
vcpkg_configure_cmake -> vcpkg_cmake_configure (Please remove the option PREFER_NINJA) (from port vcpkg-cmake)
vcpkg_fixup_cmake_targets -> vcpkg_cmake_config_fixup (from port vcpkg-cmake-config)

In the ports that use the new function, you have to add the corresponding dependencies:

{
  "name": "vcpkg-cmake",
  "host": true
},
{
  "name": "vcpkg-cmake-config",
  "host": true
}

The following files are affected:

• ports/asio-grpc/portfile.cmake

[Tradias]

@JonLiu1993 thank you for your suggestions. I have addressed them in the latest commit

[JonLiu1993]

All feature are tested successfully in the following triplet:

• x86-windows
• x64-windows
• x64-windows-static

[BillyONeal]

Thanks for the new port!