chore: use language import instead of `-Ycompile-scala2-library`#23082

Draft

hamzaremmal wants to merge 4 commits intoscala:mainfrom

hamzaremmal:compile-as-scala2

Commits on May 1, 2025

Commits on May 2, 2025

chore: disable Ycheck
hamzaremmal
committed

Commits on May 7, 2025

chore: rename `scala.language.2` to `scala.language.2.13`
hamzaremmal
committed