Auto merge of #107318 - matthiaskrgr:rollup-776kd81, r=matthiaskrgr

Auto merge of #107318 - matthiaskrgr:rollup-776kd81, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #97373 (impl DispatchFromDyn for Cell and UnsafeCell)
 - #106625 (Remove backwards compat for LLVM 12 coverage format)
 - #106779 (Avoid __cxa_thread_atexit_impl on Emscripten)
 - #106811 (Append .dwp to the binary filename instead of replacing the existing extension.)
 - #106836 (Remove optimistic spinning from `mpsc::SyncSender`)
 - #106946 (implement Hash for proc_macro::LineColumn)
 - #107074 (remove unnecessary check for opaque types)
 - #107287 (Improve fn pointer notes)
 - #107304 (Use `can_eq` to compare types for default assoc type error)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup