test(gcp_pubsub): attempt to fix flakiness
https://github.com/emqx/emqx/actions/runs/5125118728/jobs/9218520994?pr=10887#step:8:309
```
=CRITICAL REPORT==== 30-May-2023::19:19:34.887082 ===
"check stage" failed: error
{assertMatch,[{module,emqx_bridge_gcp_pubsub_SUITE},
{line,1066},
{expression,"? of_kind ( gcp_pubsub_request_failed , Trace )"},
{pattern,"[ # { reason := Error , connector := ResourceId } | _ ]"},
{value,[#{connector =>
<<"bridge:gcp_pubsub:emqx_bridge_gcp_pubsub_SUITE0005FCEE15534E9CD4CD02004CF10000">>,
msg => gcp_pubsub_request_failed,query_mode => async,
reason => {closed,"The connection was lost."},
recoverable_error => true,
'~meta' =>
#{gl => <0.17903.2>,
location =>
#Fun<emqx_bridge_gcp_pubsub_connector.19.19548918>,
node => 'test@127.0.0.1',pid => <0.19724.2>,
time => -576460610660164}}]}]}
Stacktrace: [{emqx_bridge_gcp_pubsub_SUITE,
'-do_econnrefused_or_timeout_test/2-fun-2-',3,
[{file,
"/__w/emqx/emqx/source/apps/emqx_bridge_gcp_pubsub/test/emqx_bridge_gcp_pubsub_SUITE.erl"},
{line,1066}]},
{emqx_bridge_gcp_pubsub_SUITE,do_econnrefused_or_timeout_test,2,
[{file,
"/__w/emqx/emqx/source/apps/emqx_bridge_gcp_pubsub/test/emqx_bridge_gcp_pubsub_SUITE.erl"},
{line,1022}]}]
```
1e25ebb64c