[DO NOT MERGE] Try to enable explicit nulls for Scala 3 stdlib#23319

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noti0na1 wants to merge 2 commits intoscala:sync-scala-libraryfrom

dotty-staging:sync-scala-library

Commits on May 8, 2025

Some small change
noti0na1
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Commits on Jun 5, 2025

First round
noti0na1
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