[FLINK-33414] Fix the unstable test MiniClusterITCase.testHandleStreamingJobsWhenNotEnoughSlot

[jiangxin369]

What is the purpose of the change

Fix the unstable test MiniClusterITCase.testHandleStreamingJobsWhenNotEnoughSlot.

Brief change log

• Disable the resource requirements to make sure the job failed to acquire slots until timeout.

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

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:

• 72bedb7 Azure: FAILURE

Bot commands

The @flinkbot bot supports the following commands:

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

[jiangxin369]

@XComp Could you help review this PR when you are free?

[XComp]

Thanks, @jiangxin369 for your efforts. I found the time to look into the issue. Your change looks reasonable. I have one question, though. PTAL.

[XComp]

LGTM 👍 I'm gonna go ahead and merge it after CI turned green.

[XComp]

The test failure is unrelated to this change (because it's python). I'm gonna go ahead and merge this PR.