Auto merge of #41564 - gaurikholkar:master, r=nikomatsakis

Disable ref hint for pattern in let and adding ui tests #40402

A fix to #40402

The `to prevent move, use ref e or ref mut e ` has been disabled.
```
fn main() {
    let v = vec![String::from("oh no")];

    let e = v[0];
}
```
now gives
```
error[E0507]: cannot move out of indexed content
 --> example.rs:4:13
  |
4 |     let e = v[0];
  |             ^^^^ cannot move out of indexed content

error: aborting due to previous error
```
I have added ui tests for the same and also modified a compile-fail test.

0 files changed, 0 insertions, 0 deletions