Rollup merge of #108401 - notriddle:notriddle/diagnostics-article, r=compiler-errors

diagnostics: remove inconsistent English article "this" from E0107

Consider [`tests/ui/const-generics/generic_const_exprs/issue-102768.stderr`][issue-102768.stderr], the error message where it gives additional notes about where the associated type is defined, and how the dead code lint doesn't have an article, like in [`tests/ui/lint/dead-code/issue-85255.stderr`][issue-85255.stderr]. They don't have articles, so it seems unnecessary to have one here.

[issue-102768.stderr]: https://github.com/rust-lang/rust/blob/07c993eba8b76eae497e98433ae075b00f01be10/tests/ui/const-generics/generic_const_exprs/issue-102768.stderr
[issue-85255.stderr]: https://github.com/rust-lang/rust/blob/07c993eba8b76eae497e98433ae075b00f01be10/tests/ui/lint/dead-code/issue-85255.stderr

Author: matthiaskrgr

compiler/rustc_hir_analysis/src/structured_errors/wrong_number_of_generic_args.rs

@@ -462,7 +462,7 @@ impl<'a, 'tcx> WrongNumberOfGenericArgs<'a, 'tcx> {
 
         if self.gen_args.span_ext().is_some() {
             format!(
-                "this {} takes {}{} {} argument{} but {} {} supplied",
+                "{} takes {}{} {} argument{} but {} {} supplied",
                 def_kind,
                 quantifier,
                 bound,

tests/rustdoc-ui/unable-fulfill-trait.stderr

@@ -1,4 +1,4 @@
-error[E0107]: this trait takes 1 generic argument but 0 generic arguments were supplied
+error[E0107]: trait takes 1 generic argument but 0 generic arguments were supplied
   --> $DIR/unable-fulfill-trait.rs:4:17
    |
 LL |     field1: dyn Bar<'a, 'b,>,