feat(data-warehouse): Support for Experiment-optimized JOINs

[danielbachhuber]

See #26332

Changes

Adds a new "Optimize for Experiments" field to data warehouse joins when "events" is selected as the joining table:

The user must also select a source timestamp key:

Data warehouse trends experiment continues to display the expected data:

Clicking "Explore results" generates an insight that renders as expected:

How did you test this code?

• Created a new data warehouse join and verified:
  • The "Optimize for Experiments" field doesn't display when the joining table is not "events".
  • The "Optimize for Experiments" field displays as expected when the joining table is "events".
  • Selecting a "Source Timestamp Key" sets "Optimize for Experiments" as selected.
  • Unchecking "Optimize for Experiments" clears the "Source Timestamp Key" field.
  • Values are loaded as expected when editing a data warehouse join.
• Verified my existing data warehouse experiment results displayed as expected.
• Clicked on "Explore results" and verified the insight rendered data as expected.
• All tests passed.

[github-actions]

Size Change: 0 B

Total Size: 1.11 MB

ℹ️ View Unchanged

Filename	Size
frontend/dist/toolbar.js	1.11 MB

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[Gilbert09]

Looks good, just a heads up that this join functionality will eventually be replaced by "data modeling" in data warehouse in likely ~3 months time - but we'll make sure to chat to you guys before we do anything there (cc @EDsCODE)

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ ResolutionError: Can not access property "properties" on field "event" of type: StringDatabaseField posthog.tasks.tasks.process_query_task View Issue
• ‼️ QueryError: Unable to resolve field: properties posthog.tasks.tasks.process_query_task View Issue
• ‼️ QueryError: Unable to resolve field: events posthog.tasks.tasks.process_query_task View Issue
• ‼️ ResolutionError: Invalid field access with empty chain posthog.tasks.tasks.process_query_task View Issue
• ‼️ AttributeError: 'NoneType' object has no attribute 'resolve_constant_type' posthog.tasks.tasks.process_query_task View Issue

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