[FLINK-32523][test] Guarantee all operators triggering decline checkpoint together for NotifyCheckpointAbortedITCase#testNotifyCheckpointAborted

[masteryhx]

What is the purpose of the change

This pr wants to fix assert error for NotifyCheckpointAbortedITCase#testNotifyCheckpointAborted
: All operators haven't snapshotState together strictly for marked decline checkpoint id in the teste case (This could be reproduced by adding Thread.sleep after first verifyAllOperatorsNotifyAborted() )

I think we could just make them snapshotState together strictly which I think the ITCase should guarantee.

Brief change log

• Guarantee all operators triggering marked decline checkpoint id together

Verifying this change

This change just fix the error ITCase.

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? no

[flinkbot]

CI report:

• 1082f1c Azure: SUCCESS

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[masteryhx]

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