Fix test flake properties_section

This test flaked in CI with the following error:
```
=== === Reason: no match of right hand side value {error,half_attached}
  in function  amqp_utils:detach_link_sync/1 (amqp_utils.erl, line 100)
  in call from amqp_filtex_SUITE:properties_section/1 (amqp_filtex_SUITE.erl, line 187)
  in call from test_server:ts_tc/3 (test_server.erl, line 1793)
  in call from test_server:run_test_case_eval1/6 (test_server.erl, line 1302)
  in call from test_server:run_test_case_eval/9 (test_server.erl, line 1234)
```

Author: ansd

deps/rabbit/test/amqp_filtex_SUITE.erl

@@ -182,6 +182,9 @@ properties_section(Config) ->
     {ok, Receiver3} = amqp10_client:attach_receiver_link(
                         Session, <<"receiver 3">>, Address,
                         unsettled, configuration, Filter3),
+    receive {amqp10_event, {link, Receiver3, {attached, #'v1_0.attach'{}}}} -> ok
+    after 5000 -> ct:fail({missing_event, ?LINE})
+    end,
     ok = amqp10_client:flow_link_credit(Receiver3, 10, never),
     ok = assert_no_msg_received(?LINE),
     ok = detach_link_sync(Receiver3),