Improve symbol order in completions provided by the presentation compiler (scala#23888)

Extension methods that are not in the same file are placed after all
Product methods and even after extension methods like "ensuring". This
PR penalizes the following methods, so that they are no longer at the
top of the suggestions:
- scala.Product.*
- scala.Equals.*
- scala.Predef.ArrowAssoc.*
- scala.Predef.Ensuring.*
- scala.Predef.StringFormat.*
- scala.Predef.nn
- scala.Predef.runtimeChecked

Resolves scalameta/metals#7642
[Cherry-picked 7d27633][modified]

Author: tgodzik