use default SDK image and aarch64 wheel

[aIbrahiim]

Please add a meaningful description for your change here

---

Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily:

• Mention the appropriate issue in your description (for example: addresses #123), if applicable. This will automatically add a link to the pull request in the issue. If you would like the issue to automatically close on merging the pull request, comment fixes #<ISSUE NUMBER> instead.
• Update CHANGES.md with noteworthy changes.
• If this contribution is large, please file an Apache Individual Contributor License Agreement.

See the Contributor Guide for more tips on how to make review process smoother.

To check the build health, please visit https://github.com/apache/beam/blob/master/.test-infra/BUILD_STATUS.md

GitHub Actions Tests Status (on master branch)

See CI.md for more information about GitHub Actions CI or the workflows README to see a list of phrases to trigger workflows.

[github-actions]

Checks are failing. Will not request review until checks are succeeding. If you'd like to override that behavior, comment assign set of reviewers

[Amar3tto]

Tested: https://github.com/apache/beam/actions/runs/34204205571

[Abacn]

We should still use gcr.io/apache-beam-testing images. The Dataflow dev (beam-master) image doesn't publish regularly and not suitable for quickly detecting regressions. I understand we try to resolve the version mismatch found during release verification: #39957 . We can resolve this conflict by replacing the latest tag to the one found in gradle.properties:

beam/gradle.properties

Line 34 in ac159f4

sdk_version=2.77.0.dev

gcr.io/apache-beam-testing/beam-sdk/beam_python3.14_sdk:2.77.0.dev

[github-actions]

Assigning reviewers:

R: @claudevdm for label python.
R: @Abacn for label build.

Note: If you would like to opt out of this review, comment assign to next reviewer.

Available commands:

• stop reviewer notifications - opt out of the automated review tooling
• remind me after tests pass - tag the comment author after tests pass
• waiting on author - shift the attention set back to the author (any comment or push by the author will return the attention set to the reviewers)

The PR bot will only process comments in the main thread (not review comments).