Auto merge of #59073 - Xanewok:rustup-rustc-interface, r=Zoxc

Update RLS and Clippy due to #56732 (rustc_interface crate)

Closes #59060.

In addition to plain submodule bumps, this also contains update to rls-rustc. The in-tree, from the RLS monorepo, version is used instead of the crates.io one (@nrc I think we might stop publishing `rls-rustc` altogether, right? It's only there to work around passing `-Zsave-analysis` to stable `rustc` and meant to be used only by RLS, IIRC).

@Zoxc also due to how we need to access the expanded AST still from the RLS side in order to pass save analysis data in-memory, I delayed the AST drop after the `after_analysis` callback if the `-Zsave-analysis` is passed.

It'd be also good if you could take a look at the changes inside the `rls` and `rls-rustc`: rust-lang/rls@6a1b5a9...6840dd6. The `rls-rustc` is based on your [PR](rust-dev-tools/rls-rustc#11) but I also had to change some bits in the RLS itself.

r? @Zoxc / @Manishearth

Author: bors