Add `ErrorGuaranteed` to `ast::LitKind::Err`, `token::LitKind::Err`. Similar to recent work doing the same for `ExprKind::Err` (#120586) and `TyKind::Err` (#121109). r? `@oli-obk`
riscv32im_risc0_zkvm_elf
ErrorGuaranteed
ast::LitKind::Err
token::LitKind::Err
compiler-builtins-weak-intrinsics
-Zbuild-std