Unify handling of view hover/selections in a common place

[grtlr]

Related

• View highlights flicker on leaving a view #8494
• Add missing click and hover interactions for views #8495

The PR above has some more information. There is also an internal discussion here: https://rerunio.slack.com/archives/C04MTSM2U91/p1734420075077489

What

From the PR above:

@Wumpf @abey79 I feel like the pattern repeats itself and it's easy to miss when writing new views. So I wonder if this could be unified. I see several options for this:

• repurpose handle_select_hover_drag_interactions which only seems to be used for DataResult right now
• Making each view return a Result<(Response, ViewSystemExecutionError> (instead of ()) and handling it outside of the view.
• Creating a function analogous to handle_select_hover_drag_interactions.