Auto merge of #63491 - Xanewok:update-rls, r=Mark-Simulacrum

Update RLS

This fixes handling default configuration for the `crate_blacklist`
RLS configuration.

Technically this isn't needed, as the VS Code extension can be
configured to accept a predefined blacklist that's equal to the default
one but it's best that it also lands so that we don't need to work
around that.

Without this, manually passing a `null` value as the configuration
unfortunately crashes the RLS. This is the last fix related to configuration.

cc #63472

r? @Mark-Simulacrum

Author: bors