Closes rust-lang#96189

Closes rust-lang#96189

Everything is `Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize`
except `Crate` and `Item` which arn't `Hash`, as they have `HashMap`'s.
See linked issue for reasoning.

…li-obk

Lower let-else in MIR

This MR will switch to lower let-else statements in MIR building instead.

To lower let-else in MIR, we build a mini-switch two branches. One branch leads to the matching case, and the other leads to the `else` block. This arrangement will allow temporary lifetime analysis running as-is so that the temporaries are properly extended according to the same rule applied to regular `let` statements.

cc rust-lang#87335

Fix rust-lang#98672

rustdoc-json-types: Clean up derives.

Closes rust-lang#96189

Everything is `Clone, Debug, PartialEq, Eq, Hash, Serialize, Deserialize` except `Crate` and `Item` which arn't `Hash`, as they have `HashMap`'s. See linked issue for reasoning.

```@rustbot``` modify labels: +T-rustdoc +A-rustdoc-json

Add some autolabels for A-bootstrap and T-infra

…13, r=Dylan-DPC

Add regression test for rust-lang#74713

closes rust-lang#74713

…r-a, r=jyn514

Mention rust-analyzer maintainers when `proc_macro` bridge is changed

rust-analyzer vendors a modified copy of the `proc_macro` crate in order to expand procedural macros built by Cargo. Since the ABI used by proc macros can change, we need to follow along with those changes. Getting notified when the proc macro bridge changes should make that easier, since that's what defines the ABI.

cc ````@rust-lang/wg-rls-2````

…r=nikic

llvm-wrapper: adapt for LLVM API change

This adapts RustWrapper's ` LLVMRustInlineAsmVerify` for LLVM commit llvm/llvm-project@00797b8.