[Feature Request]: Add Postcommit Dataflow ARM tests for Java and Python

### What would you like to happen?

Currently only Go has a PostCommit test suite on Dataflow ARM: [https://github.com/apache/beam/blob/master/.github/workflows/beam_PostCommit_Go_Dataflow_ARM.yml](https://www.google.com/url?q=https://github.com/apache/beam/blob/master/.github/workflows/beam_PostCommit_Go_Dataflow_ARM.yml&sa=D&source=buganizer&usg=AOvVaw3i7VMgvCoRvZ_O3xQWykAt).

We want to have PostCommit ARM test suites for Python and Java that run not only wordcount but also other tests on Dataflow runner.

### Issue Priority

Priority: 2 (default / most feature requests should be filed as P2)

### Issue Components

- [X] Component: Python SDK
- [ ] Component: Java SDK
- [X] Component: Go SDK
- [ ] Component: Typescript SDK
- [ ] Component: IO connector
- [ ] Component: Beam examples
- [ ] Component: Beam playground
- [ ] Component: Beam katas
- [ ] Component: Website
- [ ] Component: Spark Runner
- [ ] Component: Flink Runner
- [ ] Component: Samza Runner
- [ ] Component: Twister2 Runner
- [ ] Component: Hazelcast Jet Runner
- [ ] Component: Google Cloud Dataflow Runner