[FLINK-36663][Window]Fix the first processWatermark has extra data after restore by restore timeService's watermark.

[xing1mo]

What is the purpose of the change

Restore the currentWatermark of WindowTimerService. If not restored, the slidingWindow will output extra data.

Brief change log

Restore the currentWatermark of WindowTimerService.

Verifying this change

This change added tests and can be verified as follows:

• Added test that validates whether the hopping window restores the output data consistently.

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? not applicable

[flinkbot]

CI report:

• 8c8ae34 Azure: SUCCESS Azure: FAILURE

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