build(vcpkg): remove cmake warning due to boost

[hyoklee]

CMake Warning (dev) at vcpkg/installed/x64-linux/share/boost/vcpkg-cmake-wrapper.cmake:3 (_find_package):
  Policy CMP0167 is not set: The FindBoost module is removed.  Run "cmake
  --help-policy CMP0167" for policy details.  Use the cmake_policy command to
  set the policy and suppress this warning.

Call Stack (most recent call first):
  vcpkg/scripts/buildsystems/vcpkg.cmake:850 (include)
  CMake/ChimaeraCommonConfig.cmake:34 (find_package)
  CMakeLists.txt:130 (include)
This warning is for project developers.  Use -Wno-dev to suppress it.

Ref: https://my.cdash.org/builds/3121259/configure