Adjust Spark Runner to support portable combiner lifting as described in the following doc:
https://s.apache.org/beam-runner-api-combine-model
Imported from Jira BEAM-11478. Original Jira may contain additional context.
Reported by: ibzib.
Subtask of issue #18583
Adjust Spark Runner to support portable combiner lifting as described in the following doc:
https://s.apache.org/beam-runner-api-combine-model
Imported from Jira BEAM-11478. Original Jira may contain additional context.
Reported by: ibzib.
Subtask of issue #18583