Rename supertraits of CodegenMethods.

Supertraits of `BuilderMethods` are all called `XyzBuilderMethods`.
Supertraits of `CodegenMethods` are all called `XyzMethods`. This commit
changes the latter to `XyzCodegenMethods`, for consistency.

compiler/rustc_codegen_llvm/src/mono_item.rs

@@ -14,7 +14,7 @@ use crate::errors::SymbolAlreadyDefined;
 use crate::type_of::LayoutLlvmExt;
 use crate::{base, llvm};
 
-impl<'tcx> PreDefineMethods<'tcx> for CodegenCx<'_, 'tcx> {
+impl<'tcx> PreDefineCodegenMethods<'tcx> for CodegenCx<'_, 'tcx> {
     fn predefine_static(
         &self,
         def_id: DefId,