FLINK-28171 enable add appProtocol via the configuration

[sigalite]

What is the purpose of the change

enable the job manager and task manager communicate in a Kubernetes cluster with Istio and mTLS enabled.

Brief change log

Add the “appProtocol” in the task manager and job manager configuration, verify they are not overridden by the default definition in the decorators

Verifying this change

This change is already covered by existing tests

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: (yes / no / don't know)
• The S3 file system connector: no

Documentation

• Does this pull request introduce a new feature? no
• If yes, how is the feature documented? not documented

[sigalite]

@wangyang0918, @MartijnVisser please review. thanks.

[flinkbot]

CI report:

• 8e5b519 Azure: FAILURE

Bot commands

The @flinkbot bot supports the following commands:

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