E0094 needs to be updated to new format

[sophiajt]

From: src/test/compile-fail/E0094.rs

Error E0094 needs a span_label, updating it from:

error[E0094]: intrinsic has wrong number of type parameters: found 2, expected 1
  --> src/test/compile-fail/E0094.rs:13:5
   |
13 |     fn size_of<T, U>() -> usize; //~ ERROR E0094
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^

To:

error[E0094]: intrinsic has wrong number of type parameters: found 2, expected 1
  --> src/test/compile-fail/E0094.rs:13:5
   |
13 |     fn size_of<T, U>() -> usize; //~ ERROR E0094
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected 1 type parameter

Bonus: That span is pretty long, though I'm not sure if it can be fixed. Worth seeing if we can shrink the span to:

error[E0094]: intrinsic has wrong number of type parameters: found 2, expected 1
  --> src/test/compile-fail/E0094.rs:13:5
   |
13 |     fn size_of<T, U>() -> usize; //~ ERROR E0094
   |                ^^^^ expected 1 type parameter

[theypsilon]

I would take this one.