Handle Scala 3 star in import braces

[som-snytt]

Just a tweak. As reported on gitter.

[dwijnand]

For a second I thought it said "Wildcard import cannot be tamed".

Thanks for the quickfix!

[smarter]

This PR should be backported to 2.12 since it fixes an issue introduced by a commit that was also backported to 2.12 (#9589). Is there a label or something that can be applied to this PR to make sure this isn't forgotten?

[som-snytt]

I will back-tweak. I happen to be wearing my "Wildcard imports can't be tamed" t-shirt.

[som-snytt]

OK, it's getting sbt 1.3.13...

[som-snytt]

It's not a back-twitch because on 2.12

scala> object X { def f = 42 }
defined object X

scala> { import X.{_ => g} ; f }
res1: Int = 42

[som-snytt]

#9665