Since legacy tunnels have been removed for a while now, we can remove
many of the capnp rpc interfaces that are no longer leveraged by the
legacy tunnel registration and authentication mechanisms.
To help support temporary errors that can occur in the capnp rpc
calls, a wrapper is introduced to inspect the error conditions and
allow for retrying within a short window.
Combines the tunnelrpc and quic/schema capnp files into the same module.
To help reduce future issues with capnp id generation, capnpids are
provided in the capnp files from the existing capnp struct ids generated
in the go files.
Reduces the overall interface of the Capnp methods to the rest of
the code by providing an interface that will handle the quic protocol
selection.
Introduces a new `rpc-timeout` config that will allow all of the
SessionManager and ConfigurationManager RPC requests to have a timeout.
The timeout for these values is set to 5 seconds as non of these operations
for the managers should take a long time to complete.
Removed the RPC-specific logger as it never provided good debugging value
as the RPC method names were not visible in the logs.
Devin Carr