What needs to happen?

After #30789 we can remove support for Flink 1.14 and review code to do cleanup of unneeded version specific code in runners/flink/<version>/src.

Issue Priority

Priority: 3 (nice-to-have improvement)

Issue Components

• Component: Python SDK
• Component: Java SDK
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• Component: Typescript SDK
• Component: IO connector
• Component: Beam YAML
• Component: Beam examples
• Component: Beam playground
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