[Discover] Ad-hoc data views

[kertal]

This issue is tracking the work necessary for implementing Add-hoc data views

8.5

• ✅ Ad-hoc data view integration
  • ISSUE [Discover] Add ad-hoc data views to saved searches #139543
  • PR [Discover] Implement ad-hoc data views #138283

8.6

• ✅ Ad-hoc data view usage in Elasticsearch query alert rules
  • ISSUE [Discover] Implement creating alert rules with ad hoc data view #142389
  • PR [Discover] Enable esQuery alert for adhoc data views #140885

8.7

• [Discover] Allow data view editing without switching the management #144801
• [Discover] Should be able to create ad-hoc data views from no data screen in Discover. #143676
• [Rules] Add validation to prevent selecting a data view without a time field in "Elasticsearch query" rule flyout #135806

8.9

• [Discover] Users cannot share permalink ->share snapshot/saved object on ad-hoc dataviews #142525
• [Discover] enable reporting for ad-hoc dataviews #142522

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[kertal]

All done!