fix: Tracing span names should match function names

[Wilfred]

When viewing traces, it's slightly confusing when the span name doesn't match the function name. Ensure the names are consistent.

(It might be worth moving most of these to use #[tracing::instrument] so the name can never go stale. @davidbarsky suggested that is marginally slower, so I've just done the simple change here.)

[davidbarsky]

(It might be worth moving most of these to use #[tracing::instrument] so the name can never go stale. @davidbarsky suggested that is marginally slower, so I've just done the simple change here.)

it's also kinda more annoying if you only want to record some parameters. The runtime speed should be the same, it's just a papercut in compile times.

[Veykril]

Fwiw, using the attribute is also worse for rust-analyzer analysis performance

[Veykril]

@bors delegate+

[bors]

:v: @Wilfred, you can now approve this pull request!

If @Veykril told you to "r=me" after making some further change, please make that change, then do @bors r=@Veykril

[Wilfred]

@bors r=@Veykril

[bors]

:pushpin: Commit c981ff09442cf04cf469223d7690a365126f45ea has been approved by Veykril

It is now in the queue for this repository.

[bors]

:hourglass: Testing commit c981ff09442cf04cf469223d7690a365126f45ea with merge 49e502b277a8126a9ad10c802d1aaa3ef1a280ef...

[bors]

:sunny: Test successful - checks-actions Approved by: Veykril Pushing 49e502b277a8126a9ad10c802d1aaa3ef1a280ef to master...