Rollup of 9 pull requests

[Centril]

Successful merges:

• Fix ICE with struct ctors and const generics. #60839 (Fix ICE with struct ctors and const generics.)
• Stabilize RefCell::try_borrow_unguarded #60850 (Stabilize RefCell::try_borrow_unguarded)
• Fix linkage diagnostic so it doesn't ICE for external crates #61231 (Fix linkage diagnostic so it doesn't ICE for external crates)
• Box::into_vec: use Box::into_raw instead of mem::forget #61244 (Box::into_vec: use Box::into_raw instead of mem::forget)
• Revert "Disable solaris target since toolchain no longer builds" #61280 (Revert "Disable solaris target since toolchain no longer builds")
• Update all s3 URLs used on CI with subdomains #61284 (Update all s3 URLs used on CI with subdomains)
• update miri #61295 (update miri)
• ci: display more debug information in the init_repo script #61322 (ci: display more debug information in the init_repo script)
• Fix ICE with APIT in a function with a const parameter #61333 (Fix ICE with APIT in a function with a const parameter)

Failed merges:

• Speed up Azure CI installing Windows dependencies #61304 (Speed up Azure CI installing Windows dependencies)

r? @ghost