fix(insights): support editing insights by updating source

[nikitaevg]

Problem

#17839

Changes

Propagate insight changes if changes come from the source editor.

The solution is not very pretty, but it's the best I could come up with. So in Insight we create the setQuery callback that updates the query if it's not an InsightQueryViz. This if is needed because if it is an InsightQueryViz, setQuery is already called from another place, and calling here setQuery will cause an infinite recursion. Recursion happens because we set setQuery here and then here is where the recursion happens, props.setQuery is exactly the action.setQuery. I understand the explanation could not be less clear, but I hope nobody will read it.

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

Yes

How did you test this code?

A Cypress test + manually (see the screencast).