Rollup merge of #138754 - oli-obk:push-vtqtnwluyxop, r=compiler-errors

Handle spans of `~const`, `const`  and `async` trait bounds in macro expansion

r? `@compiler-errors`

`visit_span` is actually only used in one place (the `transcribe::Marker`), and all of this syntax is unstable, so while it would still be nice to write a test for it, I wager there's lots more interesting things in `transcribe::Marker` to write tests for. And the worst is some diagnostics being weird or incremental being not as incremental as it could be

Author: matthiaskrgr