Backport "Fix stale top level synthetic package object being used in later runs" to 3.3 LTS#488

tgodzik merged 2 commits intolts-3.3scala/scala3-lts:lts-3.3from

backport-lts-3.3-23464scala/scala3-lts:backport-lts-3.3-23464Copy head branch name to clipboard