Get everything to link dynamically on native debug builds

[nikolausWest]

This would drastically reduce compile times.

[emilk]

Bumping us the priority on this since the new arrow deps increases the link times by a lot, and it is really slowing down my GUI work

[teh-cmc]

Dynamic linking while working within the workspace is probably a lost cause a this point.

But, we could do shenanigans similar to what Bevy does so that external users that are using the rerun crate as a dependency in their own project can dynamically link to it, which would drastically decrease their incremental compile times.

All of our compilation targets that behave like external projects (examples, benchmarks, demos... there are a lot of them) should also benefit from this.