This PR enables the
[`clippy::map_flatten`](https://rust-lang.github.io/rust-clippy/master/index.html#/map_flatten)
rule and fixes the outstanding violations.
Release Notes:
- N/A
eaf2fbb21bMarshall Bowers committed on 3/2/2024, 11:24:22 PM· committed by GitHubparent8bc35c3