[pulsar-sql] Handle schema not found (#4890)

* Handle get schema 404 in pulsar sql(table meta and get splits)

* Fix unit test.

* add defaultSchema()

* use Schema.BYTES.getSchemaInfo()

* add unit test

* rebase and fix unit tests
6 files changed
tree: 3cb01b2fc8e0929c8c8732cbd7076096db4670a3
  1. pulsar-sql/