feat(frame-support-procedural): add `automaticaly_derived` attr to `NoBound` derives (#2197)

fixes #2196

substrate/frame/support/procedural/src/no_bound/clone.rs

@@ -98,6 +98,7 @@ pub fn derive_clone_no_bound(input: proc_macro::TokenStream) -> proc_macro::Toke
 
 	quote::quote!(
 		const _: () = {
+			#[automatically_derived]
 			impl #impl_generics ::core::clone::Clone for #name #ty_generics #where_clause {
 				fn clone(&self) -> Self {
 					#impl_

substrate/frame/support/procedural/src/no_bound/debug.rs

@@ -112,6 +112,7 @@ pub fn derive_debug_no_bound(input: proc_macro::TokenStream) -> proc_macro::Toke
 
 	quote::quote!(
 		const _: () = {
+			#[automatically_derived]
 			impl #impl_generics ::core::fmt::Debug for #input_ident #ty_generics #where_clause {
 				fn fmt(&self, fmt: &mut ::core::fmt::Formatter) -> ::core::fmt::Result {
 					#impl_

substrate/frame/support/procedural/src/no_bound/default.rs

@@ -149,6 +149,7 @@ pub fn derive_default_no_bound(input: proc_macro::TokenStream) -> proc_macro::To
 
 	quote!(
 		const _: () = {
+			#[automatically_derived]
 			impl #impl_generics ::core::default::Default for #name #ty_generics #where_clause {
 				fn default() -> Self {
 					#impl_

substrate/frame/support/procedural/src/no_bound/partial_eq.rs

@@ -128,6 +128,7 @@ pub fn derive_partial_eq_no_bound(input: proc_macro::TokenStream) -> proc_macro:
 
 	quote::quote!(
 		const _: () = {
+			#[automatically_derived]
 			impl #impl_generics ::core::cmp::PartialEq for #name #ty_generics #where_clause {
 				fn eq(&self, other: &Self) -> bool {
 					#impl_

substrate/frame/support/test/tests/derive_no_bound.rs

@@ -136,6 +136,7 @@ struct StructNoGenerics {
 	field2: u64,
 }
 
+#[allow(dead_code)]
 #[derive(DebugNoBound, CloneNoBound, EqNoBound, PartialEqNoBound, DefaultNoBound)]
 enum EnumNoGenerics {
 	#[default]
@@ -162,6 +163,7 @@ enum Enum<T: Config, U, V> {
 }
 
 // enum that will have a named default.
+#[allow(dead_code)]
 #[derive(DebugNoBound, CloneNoBound, EqNoBound, PartialEqNoBound, DefaultNoBound)]
 enum Enum2<T: Config> {
 	#[default]
@@ -175,6 +177,7 @@ enum Enum2<T: Config> {
 	VariantUnit2,
 }
 
+#[allow(dead_code)]
 // enum that will have a unit default.
 #[derive(DebugNoBound, CloneNoBound, EqNoBound, PartialEqNoBound, DefaultNoBound)]
 enum Enum3<T: Config> {