Auto merge of #5262 - JohnTitor:rls, r=flip1995
Auto merge of #5262 - JohnTitor:rls, r=flip1995

Revive rls integration test

RLS updated their dependencies in rust-lang/rls#1646 so we can revive the integration test. I confirm it passed on my local.

changelog: none

aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust