Enable `clippy::manual_find` (#8737)

This PR enables the
[`clippy::manual_find`](https://rust-lang.github.io/rust-clippy/master/index.html#/manual_find)
rule and fixes the outstanding violations.

Release Notes:

- N/A
a17c207217Marshall Bowers committed on 3/3/2024, 1:03:49 AM· committed by GitHubparentfc8e515
2 files changedLine totals unavailable