migration: modify test_multifd_tcp_none() to use new QAPI syntax.

modify multifd tcp common test to incorporate the new QAPI
syntax defined.

Suggested-by: Aravind Retnakaran <aravind.retnakaran@nutanix.com>
Signed-off-by: Het Gala <het.gala@nutanix.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231023182053.8711-15-farosas@suse.de>

Author: hetgala99

tests/qtest/migration-test.c

@@ -1310,7 +1310,12 @@ static int migrate_postcopy_prepare(QTestState **from_ptr,
 
     migrate_prepare_for_dirty_mem(from);
     qtest_qmp_assert_success(to, "{ 'execute': 'migrate-incoming',"
-                             "  'arguments': { 'uri': 'tcp:127.0.0.1:0' }}");
+                             "  'arguments': { "
+                             "      'channels': [ { 'channel-type': 'main',"
+                             "      'addr': { 'transport': 'socket',"
+                             "                'type': 'inet',"
+                             "                'host': '127.0.0.1',"
+                             "                'port': '0' } } ] } }");
 
     /* Wait for the first serial output from the source */
     wait_for_serial("src_serial");