[FLINK-25243][k8s] Increase the k8s transactional operation max retries in the integration tests

[wangyang0918]

What is the purpose of the change

The test in FLINK-25243 failed because of ConfigMap update conflicts. I think we could increase the retry attempt for the testing.

This is not a major issue in production since we are not updating the HA ConfigMaps concurrently so frequently.

Brief change log

• Increase the k8s transactional operation max retries in the integration tests

Verifying this change

• Manually run test Fabric8FlinkKubeClientITCase successfully with more than 1000 times. Before this, the test will fail within 50 times.

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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CI report:

• 59ac7f0 Azure: SUCCESS

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Last check on commit 4a1e6f2 (Wed Feb 23 02:18:24 UTC 2022)

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[wangyang0918]

@flinkbot run azure

[wangyang0918]

cc @gaoyunhaii Would you like to have a look on this simple change?

[gaoyunhaii]

LGTM, thanks @wangyang0918 for the PR!