Add result_and_then_ok lint

[flip1995]

In #4386 the option_and_then_some lint was added. This can also be implemented for result_and_then_ok:

fn foo() -> Result<(), ()> {
    let x = Ok(10);
    x.and_then(Ok); // This is a noop -> `x`
    x.and_then(|x| Some(..)); // This should be a `map` -> `x.map(|x| ..)`
}

Originally posted by @flip1995 in #4386

[printfn]

I'd like to try and implement this.

[printfn]

I've created a pull request #4415.

[alex-700]

fixed in #5529