[SPARK-22733] refactor StreamExecution for extensibility - ASF JIRA

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Details

Type: Sub-task
Status: Resolved
Priority: Major
Resolution: Fixed
Affects Version/s: 2.3.0
Fix Version/s: 2.3.0
Component/s: Structured Streaming
Labels:
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Description

StreamExecution currently mixes together meta-logic (tracking and signalling progress, persistence, reporting) with the core behavior of generating batches and running them. We want to reuse the former but not the latter in continuous execution, so we need to split them up.