Incorrect const parameter declaration on an impl block yields an uninformative syntax error

[PatchMixolydic]

Given the following code (playground):

struct NInts<const N: usize>([u8; N]);
impl NInts<const N: usize> {}

The current output is fairly uninformative:

error: expected one of `>`, a const expression, lifetime, or type, found keyword `const`
 --> src/lib.rs:2:11
  |
2 | impl NInts<const N: usize> {}
  |           ^^^^^ expected one of `>`, a const expression, lifetime, or type

Ideally the output should look something like this (perhaps with slightly clearer wording 😅):

error: generic parameter declarations on `impl` blocks must be attached to `impl`
 --> src/lib.rs:2:11
  |
2 | impl NInts<const N: usize> {}
  |            ^^^^^^^^^^^^^^ cannot declare a const parameter here
help: move the generic parameter declaration
  |
2 | impl<const N: usize> NInts<N> {}
  |     ----------------       -