We need to build a single .so library with the necessary C++ headers for libmessage, then archive them into a package.

The dependencies of libmessage need to be statically linked into the final dynamic shared library, such that they won't conflict with the common libraries used by Envoy, like boost.

This work also includes adding an Evergreen task to build the package periodically, so we will have test coverage for any breaking change. Ideally, this package could be a part of the rapid release.