Auto merge of #66011 - Mark-Simulacrum:beta-backport, r=pietroalbini

[beta] backport rollup

* save-analysis: Account for async desugaring in async fn return types #65936
* resolve: Turn the "non-empty glob must import something" error into a lint #65539
* Updated RELEASES.md for 1.39.0 #64878 (squashed)