Postgres connector failed after update connector to use custom Postgres publication(create manually) [DBZ-2314]

Migrated from [DBZ-2314](https://issues.redhat.com/browse/DBZ-2314)

scenario to reproduce:
# create Postgres connector with default publication name and default publication auto create mode.
# create custom publication 'test_publication' for a specific table(in addition to Debezium default publication ) 
# update connector publication name to 'test_publication'

The connector task will be on a Failed state. Initializing PGReplicationStream will throw an error 'publication "test_publication" does not exist Where: slot "connector_slot", output plugin "pgoutput", in the change callback, associated LSN 0/3DBD078"

Reproduce the three-step connector scenario, including the manually created test_publication and the publication-name update. Start at PGReplicationStream initialization and investigate why the connector reports that the publication does not exist; done means the updated connector task no longer enters Failed state.

Written by the indexing model from the issue text.