[FLINK-16204][sql] Support JSON_ARRAY for blink planner

[XuQianJin-Stars]

What is the purpose of the change

Support JSON_ARRAY function for blink planner

Brief change log

(for example:)

• Introduce JSON_ARRAY to FlinkSqlOperatorTable
• Add corresponding test cases

Verifying this change

(Please pick either of the following options)

This change added tests in JsonFunctionsTest.scala

(example:)

• Added integration tests for end-to-end deployment with large payloads (100MB)
• Extended integration test for recovery after master (JobManager) failure
• Added test that validates that TaskInfo is transferred only once across recoveries
• Manually verified the change by running a 4 node cluser with 2 JobManagers and 4 TaskManagers, a stateful streaming program, and killing one JobManager and two TaskManagers during the execution, verifying that recovery happens correctly.

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, Yarn/Mesos, 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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Automated Checks

Last check on commit 404e0de (Mon Mar 02 12:50:12 UTC 2020)

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CI report:

• 404e0de Travis: SUCCESS Azure: FAILURE

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[twalthr]

Completed in #17313.