Incorrect label messages for missing unsafe blocks

[petrochenkov]

Label message always mention "unsafe call", even when nothing is actually called.
It should duplicate the main message instead, or use some paraphrase of it.

fn main() {
    *(0 as *const u8);
}

error[E0133]: dereference of raw pointer requires unsafe function or block
 --> <anon>:2:5
  |
2 |     *(0 as *const u8);
  |     ^^^^^^^^^^^^^^^^^ unsafe call requires unsafe function or block

error: aborting due to previous error

cc #35565 @wdv4758h @jonathandturner

[wdv4758h]

How about this :

error[E0133]: dereference of raw pointer requires unsafe function or block
 --> <anon>:2:5
  |
2 |     *(0 as *const u8);
  |     ^^^^^^^^^^^^^^^^^ dereference of raw pointer

error: aborting due to previous error

error[E0133]: call to unsafe function requires unsafe function or block
  --> src/test/compile-fail/E0133.rs:14:5
   |
14 |     f(); //~ ERROR E0133
   |     ^^^ call to unsafe function

error: aborting due to previous error

[wdv4758h]

@jonathandturner I've made a PR, please check the error messages again :)

[wdv4758h]

Fix in #35818, should be closed.