GroupBy: Fetch options when opening menu

[ashharrison90]

i think this does what we want, but leaving as draft for now to check the approach before adding tests etc

what this does:

• takes the rendering logic from VariableValueSelectMulti
• enhances with isFetchingOptions and isOptionsOpen logic controlled by onOpenMenu/onCloseMenu
• fetches and waits for new options when opening the menu via model.validateAndUpdate()

some questions:

• does this logic only apply to group by, or would we want it for any multi value variable?
  • if so, could move this new logic back into VariableValueSelectMulti 🤔

Fixes #686

📦 Published PR as canary version: 4.11.2--canary.687.8737546972.0

:sparkles: Test out this PR locally via: ```bash npm install @grafana/scenes@4.11.2--canary.687.8737546972.0 # or yarn add @grafana/scenes@4.11.2--canary.687.8737546972.0 ```

[dprokop]

@ashharrison90 - I've made a couple of changes to this PR. In particular:

• I've added isLazy to SceneVariableState. Thanks to that and the change in SceneVariableSet the GroupBy values are not fetched when the picker renders. Overall this property needs to be added to other variables as well, but this is a bit bigger endeavour and won't address it here. We are tracking it in https://github.com/grafana/scenes/issues/214
• I've added tests to the code.
• I've also included a followup fix to https://github.com/grafana/scenes/pull/685 as that one did not respect the fact, that there may be inactive runners that we still want the queries from- i.e. for panels below the fold. Overall, I have implemented sort of core dashboard specific code, that ignres inactive runners with the same key. This reflects a scenario when we clone a panel in panel edit - the key of the SceneQueryRunner is the same, but the original one is not active. It's probably not the most elegant solution, but nothing else came to my mind - I'm open for any other ideas.

@torkelo - I would appreciate your eyes on this too, as I'm touching on the isLazy we discussed and introducing it in the interface for the future use.

[grafanabot]

:rocket: PR was released in v4.11.2 :rocket:

[ashharrison90]

delivered in core with https://github.com/grafana/grafana/pull/86671