Auto merge of #110935 - scottmcm:always-ord, r=Mark-Simulacrum

`inline(always)` for `lt`/`le`/`ge`/`gt` on integers and floats

I happened to notice one of these not getting inlined as part of `Range::next` in <https://rust.godbolt.org/z/4WKWWxj1G>
```rust
    bb1: {
        StorageLive(_5);
        _6 = &mut _4;
        StorageLive(_21);
        StorageLive(_14);
        StorageLive(_15);
        _15 = &((*_6).0: usize);
        StorageLive(_16);
        _16 = &((*_6).1: usize);
        _14 = <usize as PartialOrd>::lt(move _15, move _16) -> bb7;
    }
```

So since a call for something that's just one instruction is never the right choice, `#[inline(always)]` seems appropriate, like we have it on things like the rotate methods on integers.

Author: bors