[cdc_stream] Use ephemeral ports (#100)

Instead of running netstat/ss on local and remote systems, just bind
with port 0 to find an ephemeral port. This is much more robust,
simpler and a bit faster. Since the remote port is only known after
running cdc_fuse_fs, port forwarding has to be set up after running
cdc_fuse_fs.

cdc_fuse_fs/BUILD

@@ -9,8 +9,10 @@ cc_binary(
         ":cdc_fuse_fs_lib",
         ":constants",
         "//absl_helper:jedec_size_flag",
+        "//common:client_socket",
         "//common:gamelet_component",
         "//common:log",
+        "//common:server_socket",
         "//data_store:data_provider",
         "//data_store:disk_data_store",
         "//data_store:grpc_reader",