selftests/net: packetdrill: import tcp/fast_recovery, tcp/nagle, tcp/timestamping

Use the standard import and testing method, as described in the
import of tcp/ecn , tcp/close , tcp/sack , tcp/tcp_info.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Soham Chakradeo <sohamch@google.com>
Link: https://patch.msgid.link/20241217185203.297935-3-sohamch.kernel@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>