[FLINK-38504][table] Add restore tests for delta join

[xuyangzhong]

What is the purpose of the change

Add restore tests for delta join.

Brief change log

• add index for SourceTestStep
• add registeredDataForFullStage in TestValuesTableFactory
• add restore tests for delta join

Verifying this change

New tests and existent tests can verify this pr.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): no
• The public API, i.e., is any changed class annotated with @Public(Evolving): no
• The serializers: no
• The runtime per-record code paths (performance sensitive): no
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: no
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented?

[flinkbot]

CI report:

• b590638 Azure: FAILURE
• d899471 Azure: PENDING

Bot commands

The @flinkbot bot supports the following commands:

• @flinkbot run azure re-run the last Azure build