E0324 needs to be updated to new format

[sophiajt]

From: src/test/compile-fail/impl-wrong-item-for-trait.rs

Error E0324 needs a span_label, updating it from:

error[E0324]: item `MY_CONST` is an associated method, which doesn't match its trait `<FooMethodForConst as Foo>`
  --> src/test/compile-fail/impl-wrong-item-for-trait.rs:32:5
   |
32 |     fn MY_CONST() {}
   |     ^^^^^^^^^^^^^^^^

To:

error[E0324]: item `MY_CONST` is an associated method, which doesn't match its trait
  --> src/test/compile-fail/impl-wrong-item-for-trait.rs:32:5
   |
32 |     fn MY_CONST() {}
   |     ^^^^^^^^^^^^^^^^ does not match trait
   |
   = note: matching trait  `<FooMethodForConst as Foo>`

Bonus: show the original requirement also

error[E0324]: item `MY_CONST` is an associated method, which doesn't match its trait
  --> src/test/compile-fail/impl-wrong-item-for-trait.rs:32:5
   |
15 |    const MY_CONST: u32;
   |    -------------------- original trait requirement
...
32 |     fn MY_CONST() {}
   |     ^^^^^^^^^^^^^^^^ does not match trait
   |
   = note: matching trait  `<FooMethodForConst as Foo>`

Note: this may be related to #35325

[KiChjang]

Should be fixed by #35372.