Reporting: Task Manager integration for 7.x

[tsullivan]

Summary

This PR removes ESQueue from Reporting and backports #64853 to the 7.x branch. Kibana stays compatible with pending reports that were scheduled with ESQueue in an earlier 7.x version by polling for report documents that do not have a kibanaVersion field.

Testing:

Queue up a bunch of reports while running the current 7.x. While some reports are still pending, switch the code to this PR branch, and restart Kibana. The pending reports should be "migrated" by being detected in the reports:monitor task and rescheduled as tasks with Task Manager.

[tsullivan]

@elasticmachine merge upstream

[tsullivan]

@elasticmachine merge upstream

[tsullivan]

@elasticmachine merge upstream

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 66f3489
• Storybooks Preview
• Documentation Changes

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
reporting	123	131	+8

Public APIs missing exports

Total count of every type that is part of your API that should be exported but is not. This will cause broken links in the API documentation system. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats exports for more detailed information.

id	before	after	diff
reporting	17	18	+1

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
reporting	85.4KB	85.5KB	+24.0B

Unknown metric groups

API count

id	before	after	diff
reporting	124	132	+8

History

• 💔 Build #133751 failed 6ec53ba
• 💚 Build #132898 succeeded e5baf10
• 💚 Build #132293 succeeded 392c8d3
• 💚 Build #131936 succeeded d85ad77
• 💛 Build #131475 was flaky 203b2ed

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream