Rollup merge of #148678 - xonx4l:EO412_replacement_with_EO425, r=Kivooeo

Merge E0412 into E0425

This PR merge E0412 into E0425  as both mean the same thing to users.

This fixes https://github.com/rust-lang/rust/issues/148558.

compiler/rustc_error_codes/src/error_codes/E0412.md

@@ -1,8 +1,8 @@
-A used type name is not in scope.
+#### Note: this error code is no longer emitted by the compiler.
 
 Erroneous code examples:
 
-```compile_fail,E0412
+```compile_fail,E0425
 impl Something {} // error: type name `Something` is not in scope
 
 // or:
@@ -42,7 +42,7 @@ module. To fix this, you can follow the suggestion and use File directly or
 `use super::File;` which will import the types from the parent namespace. An
 example that causes this error is below:
 
-```compile_fail,E0412
+```compile_fail,E0425
 use std::fs::File;
 
 mod foo {