posthog chore: convert simple / advanced filters to universal if enabled

Problem

Changes

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

How did you test this code?

Jun 27 '24 18:06 daibhin

@pauldambra there is still a bit of work left in this one but this is the converter that allows us to enable the new universal filters in production. It basically flips us from a world where simple / advanced filters were expected to one where universal filters are the default.

Will spend tomorrow testing this out and making sure everything works with the flag enabled / disabled but wanted to give you a heads up for review purposes

Jun 27 '24 18:06 daibhin

Size Change: +200 B (+0.02%)

Total Size: 1.07 MB

ℹ️ View Unchanged

Filename	Size	Change
`frontend/dist/toolbar.js`	1.07 MB	+200 B (+0.02%)

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Jun 27 '24 18:06 github-actions[bot]

Hey @daibhin! 👋 This pull request seems to contain no description. Please add useful context, rationale, and/or any other information that will help make sense of this change now and in the distant Mars-based future.