Auto merge of #116052 - oli-obk:ceci_nest_pas_une_query, r=WaffleLapkin

Add a way to decouple the implementation and the declaration of a TyCtxt method.

properly addresses rust-lang/rust#115819

accepted MCP: rust-lang/compiler-team#395

Author: bors

clippy_utils/src/consts.rs

@@ -718,7 +718,7 @@ fn field_of_struct<'tcx>(
     field: &Ident,
 ) -> Option<mir::Const<'tcx>> {
     if let mir::Const::Val(result, ty) = result
-        && let Some(dc) = lcx.tcx.try_destructure_mir_constant_for_diagnostics((result, ty))
+        && let Some(dc) = lcx.tcx.try_destructure_mir_constant_for_diagnostics(result, ty)
         && let Some(dc_variant) = dc.variant
         && let Some(variant) = adt_def.variants().get(dc_variant)
         && let Some(field_idx) = variant.fields.iter().position(|el| el.name == field.name)