Highlights flicker on settings change for x-model occurrences

[Yoyokrazy]

wordHighlighter will trigger a `this._run()` for each open and visible editor. also triggers a `_stopAll()` for one of these workerRequests. 

need to iron out the behavior with one of the editors as the "driver"

Originally posted by @Yoyokrazy in #196356 (comment)

[Yoyokrazy]

issue:

• change settings
• for each visible editor
  • configuration change event
  • hit wordHighlighter.ts however many editors # of times
  • 🐛 triggers a this._run() which subsequently triggers a stopAll() causing a flicker
  • workerReq debouncing limits the flicker to only happening once regardless of how many more editors there are.

[Yoyokrazy]

potential fix:
at the beginning of _run, maybe just check to see if you're the driver model (which is stored in the query). If not the driver, don't execute the run (because it's already happening)

Anyway, can probably leverage the preservedModel parameter implemented in #224243 to remove the flicker. probably just better overall. No cases where highlights get stuck either, so win win? will investigate