Listen for TLS and HTTP on the same port

[apolukhin]

Something like https://github.com/boostorg/beast/blob/develop/include/boost/beast/core/detect_ssl.hpp#L96 should be added to the https://github.com/userver-framework/userver/blob/cbd956a7cf018c68cc3d55e9de8e6f9eb07070fb/core/src/server/net/listener_impl.cpp#L91 and a test should be added.

Internal ticket: 7500, EDUPRJ-277