[Feature Request]: Add Java API for using and upgrading Iceberg via the Managed transforms API

[chamikaramj]

What would you like to happen?

We recently added an API for Managed transforms: https://github.com/apache/beam/issues/30830

We are also working on adding an Iceberg source and sink.

We need to connect Iceberg to the Managed transforms API and add support for upgrading it.

Upgrading can be performed via the Transform Service [1] by adding Schema-aware transforms for Iceberg source and sink and implementing a PTransformPayloadTranslator [2].

[1] https://beam.apache.org/documentation/programming-guide/#transform-service-usage-upgrade [2] https://github.com/apache/beam/blob/58e4f8325fc0a2f7cd71bf9ccefea06a5ac6f75b/sdks/java/core/src/main/java/org/apache/beam/sdk/util/construction/PTransformTranslation.java#L597

Issue Priority

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

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[chamikaramj]

Fixed by https://github.com/apache/beam/pull/30910