`Duration::from_mins` and `Duration::from_hours` where [recently
stabilized](https://github.com/rust-lang/rust/issues/140881) in Rust
1.91.0.
In our codebase we often times have things like
```rust
Duration::from_secs(5 * 60);
// Since Rust 1.91.0 one can use
Duration::from_mins(5)
```
During the Rust 1.91.0 bump I noticed we can finally switch to
`Duration::from_mins(5)`, but many users might not be aware of this. I
started manually updating the places, but halfway through I figured
"Can't a lint do this for me?", so I added exactly that in this PR. It
does it for all stabilized `from_XXX` time units.
changelog: Add new [`duration_suboptimal_units`] lint
Closesrust-lang/rust-clippy#16335
331a474142