[Task]: Deprecate Twister2 runner

[Abacn]

What needs to happen?

context: https://lists.apache.org/thread/2v5m0y8m27lx6w2pn80jxd38qy7c1fdx

The twister2 repo [1] hasnt seen a change in 5 years and the twister2 runner directory has had a similarly low level of activity.

As part of Beam 3.0 effort of modernizing runners, unmaintained non-portable runners are subject to deprecation (#35836).

[1] https://github.com/cylondata/twister2

Issue Priority

Priority: 2 (default / most normal work should be filed as P2)

Issue Components

• Component: Python SDK
• Component: Java SDK
• Component: Go SDK
• Component: Typescript SDK
• Component: IO connector
• Component: Beam YAML
• Component: Beam examples
• Component: Beam playground
• Component: Beam katas
• Component: Website
• Component: Infrastructure
• Component: Spark Runner
• Component: Flink Runner
• Component: Samza Runner
• Component: Twister2 Runner
• Component: Hazelcast Jet Runner
• Component: Google Cloud Dataflow Runner

[Abacn]

Twister2 runner has been deprecated as of Beam 2.68. Move to Milestone 3 for the task actually removing the support