Auto merge of #12347 - feniljain:fix_extract_module, r=Veykril
Auto merge of #12347 - feniljain:fix_extract_module, r=Veykril

fix(extract_module) resolving import panics and improve import resolution

- Should solve #11766
- While adding a test case for this issue, I observed another issue:
For this test case:
```rust
            mod x {
                pub struct Foo;
                pub struct Bar;
            }

            use x::{Bar, Foo};

            $0type A = (Foo, Bar);$0
```
extract module should yield this:

```rust
            mod x {
                pub struct Foo;
                pub struct Bar;
            }

            use x::{};

            mod modname {
                use super::x::Bar;

                use super::x::Foo;

                pub(crate) type A = (Foo, Bar);
            }
```

instead it gave:

```rust
            mod x {
                pub struct Foo;
                pub struct Bar;
            }

            use x::{};

            mod modname {
                use x::Bar;

                use x::Foo;

                pub(crate) type A = (Foo, Bar);
            }
```

So fixed this problem with second commit

rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer,rust-analyzer/rust-analyzer