[Pulsar SQL] Make Pulsar SQL get correct offload configurations (#7701)

### Motivation

Currently, Pulsar SQL can't get the correct offload configurations.

### Modifications

Make Pulsar SQL get the complete offload configurations.

### Verifying this change

Add a new integration test.
3 files changed
tree: b5f585caf6bf907adf8d0591ae269344cd25f063
  1. pulsar-sql/