[FLINK-24199][python] Expose StreamExecutionEnvironment#configure in Python API

[SteNicholas]

What is the purpose of the change

There are certain parameters that can be configured only through the underlying configuration of StreamExecutionEnvironment e.g. (execution.checkpointing.checkpoints-after-tasks-finish.enabled).We should be able to set those in the Python API.

Brief change log

• StreamExecutionEnvironment adds the configure method to configure the parameters through the underlying configuration.

Verifying this change

• StreamExecutionEnvironmentTests adds the test_configure to verify whether to configure the parameters through the underlying configuration in the StreamExecutionEnvironment.

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

• Dependencies (does it add or upgrade a dependency): (yes / no)
• The public API, i.e., is any changed class annotated with @Public(Evolving): (yes / no)
• The serializers: (yes / no / don't know)
• The runtime per-record code paths (performance sensitive): (yes / no / don't know)
• Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (yes / no / don't know)
• The S3 file system connector: (yes / no / don't know)

Documentation

• Does this pull request introduce a new feature? (yes / no)
• If yes, how is the feature documented? (not applicable / docs / JavaDocs / not documented)

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Last check on commit 169c8d3 (Thu Sep 09 01:19:12 UTC 2021)

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[dianfu]

@SteNicholas Thanks a lot for the PR. Left just two minor comments.