test(pulsar_producer): attempt to stabilize flaky test
https://github.com/emqx/emqx/actions/runs/5125166433/jobs/9218613872?pr=10886#step:7:679
```
=CRITICAL REPORT==== 30-May-2023::19:38:58.003170 ===
Run stage failed: error:{badmatch,
{timeout,
[#{msg => pulsar_producer_bridge_started,
'~meta' =>
#{gl => <97891.472.0>,
location =>
#Fun<emqx_bridge_pulsar_impl_producer.11.109752493>,
node => 'autocluster_node1@127.0.0.1',
pid => <97891.787.0>,
time => -576460611692219}}]}}
Stacktrace: [{emqx_bridge_pulsar_impl_producer_SUITE,'-t_cluster/1-fun-10-',
6,
[{file,
"/emqx/apps/emqx_bridge_pulsar/test/emqx_bridge_pulsar_impl_producer_SUITE.erl"},
{line,1073}]},
{emqx_bridge_pulsar_impl_producer_SUITE,t_cluster,1,
[{file,
"/emqx/apps/emqx_bridge_pulsar/test/emqx_bridge_pulsar_impl_producer_SUITE.erl"},
{line,1064}]}]
```
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