This takes the idea that @RemcoSmitsDev started on in
https://github.com/zed-industries/zed/pull/39354. We did away with
grabbing a snapshot of the display map when buffer coordinates were
sufficient.
Closes #37267

Release Notes:

- Reduced micro-stutters in project search with large multi-buffer
contents.

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Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>