[FLINK-39534][python] Bump pemja to 0.5.7

[wenjin272]

What is the purpose of the change

Bump pemja to 0.5.7.

Brief change log

Bump pemja to 0.5.7.

Verifying this change

This change is already covered by existing tests, such as (please describe tests).

• Origional tests

This change added tests and can be verified as follows:

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

• Dependencies (does it add or upgrade a dependency): yes
• 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? not applicable

---

Was generative AI tooling used to co-author this PR?

• Yes (please specify the tool below)

[flinkbot]

CI report:

• 00703fc Azure: FAILURE

Bot commands

The @flinkbot bot supports the following commands:

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