[Vote] Update Scala 3 to 3.3.3 on Pekko 1.0.x branch

[kerr]

It fixes some compiler backend bugs too.
And add better support for sbt/metal and coverage.

[1]
https://www.scala-lang.org/blog/2024/02/29/scala-3.4.0-and-3.3.3-released.html
[2] https://github.com/lampepfl/dotty/releases/tag/3.3.3

+1 from me.

何品