feat: add bool_to_enum assist for parameters

[winstxnhdw]

Summary

This PR adds parameter support for bool_to_enum assists. Essentially, the assist can now transform this:

fn function($0foo: bool) {
    if foo {
        println!("foo");
    }
}

To this,

#[derive(PartialEq, Eq)]
enum Bool { True, False }

fn function(foo: Bool) {
    if foo == Bool::True {
        println!("foo");
    }
}

Thanks to @/davidbarsky for the test skeleton (:

Closes #17400

[Veykril]

Okay one more simplification, I didn't realize the code generally assumes a top level ident pattern only, so using ancestor is wrong. We want to check if the ident pattern is the top most patterns in the statement/param.

Also could you squash the commits? There is a lot of very small commits that I don't think add any value here

[winstxnhdw]

Not entirely sure, but I don't think this should ever hit anymore.

[Veykril]

Thanks!
@bors r+

[bors]

📌 Commit d468746 has been approved by Veykril

It is now in the queue for this repository.

[bors]

⌛ Testing commit d468746 with merge 7e8f9c8...

[bors]

☀️ Test successful - checks-actions
Approved by: Veykril
Pushing 7e8f9c8 to master...