[branch-2.8] #12145 pass client builder if no service url provided to debezium connector

[freeznet]

Motivation

#11293 allows to passing client builder to debezium database history, but it still requires passing database.history.pulsar.service.url as well. With client builder, the database.history.pulsar.service.url is not been used anymore.
This PR fixes the logic and only pass client builder with no database.history.pulsar.service.url provided.

Cherry-pick #12145 into branch-2.8

Modifications

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