[Meta] Discarded search request cancellation

[lukasolson]

This is a list of the remaining places we still need to implement cancellation of discarded queries:

• TSVB ([TSVB] Cancel discarded searches #46353)
• Coordinate map fit data bounds ([Coordinate map] Cancel discarded "Fit data bounds" requests #46359)
• Vega ([Vega] Cancel discarded searches #46352)
• Timelion ([Timelion] Cancel discarded searches #46354)
• KQL/filter editor suggestions ([KQL] [Filter editor] Cancel discarded requests for suggestions #48797)

[elasticmachine]

Pinging @elastic/kibana-app-arch

[Dosant]

let's close in favor of #113423