Skip client_test when testing embedded server

mysql-test/t/client_test.test:
  Doesn't make sense to run this test when running the embedded server

mysql-test/t/client_test.test

+# Skip when testing the embedded server
+--source include/not_embedded.inc
 --disable_result_log
 --exec $TESTS_BINDIR/client_test --no-defaults --testcase --user=root --socket=$MASTER_MYSOCK --port=$MYSQL_TCP_PORT --silent