use ThriftCppLibrary.cmake from fbcode_builder

Summary:
Update fboss to use `ThriftCppLibrary.cmake` directly from fbcode_builder
rather than maintaining its own copy of this file.

Reviewed By: chadaustin

Differential Revision: D17005421

fbshipit-source-id: a64df426118df6088b47f09410dad7b8b7e79a43

build/fbcode_builder/CMake/ThriftCppLibrary.cmake

 # Copyright (c) Facebook, Inc. and its affiliates.
-# NOTE: If you change this file, fbcode/fboss/github/ThriftCppLibrary.cmake also
-# needs to be changed.  TODO: this should be handled via shipit.
 
 include(FBCMakeParseArgs)