test(postgres bridge): attempt to stabilize flaky test
```
%%% emqx_bridge_pgsql_SUITE ==> tcp.sync.with_batch.t_table_removed: FAILED
%%% emqx_bridge_pgsql_SUITE ==> {{panic,
#{msg => "Unexpected result",
result =>
{run_stage_failed,exit,
{test_case_failed,
"unexpected result: {error,{recoverable_error,sync_required}}"},
[{emqx_bridge_pgsql_SUITE,'-t_table_removed/1-fun-3-',3,
[{file,
"/emqx/apps/emqx_bridge_pgsql/test/emqx_bridge_pgsql_SUITE.erl"},
{line,822}]},
```
```
Error: -03T17:52:54.046809+00:00 [error] Generic server <0.352770.0> terminating. Reason: {'module could not be loaded',[{undefined,handle_message,[90,<<"I">>,{state,ssl,{sslsocket,{gen_tcp,#Port<0.1671>,tls_connection,undefined},[<0.352774.0>,<0.352773.0>]},<<>>,{336,-2093820527},on_message,{codec,#{},[null,undefined],{oid_db,#{16 =>
...
2024-07-03T17:52:54.075446+00:00 [critical] Run stage failed: exit:{test_case_failed,"unexpected result: {error,\n {resource_error,\n #{reason => exception,\n msg =>\n #{error =>\n {exit,\n {{undef,\n [{undefined,handle_message,\n [90,<<\"I\">>,\n {state,ssl,\n {sslsocket,\n {gen_tcp,#Port<0.1671>,tls_connection,\n
```
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