Make SbtBuildTool respect crossScalaVersions #11231

Job	Run time
windows-latest jdk-17 unit tests 1 / 2	22m 33s
windows-latest jdk-17 unit tests 2 / 2	22m 27s
macOS-latest jdk-17 unit tests 1 / 2	33m 27s
macOS-latest jdk-17 unit tests 2 / 2	19m 19s
ubuntu-latest jdk-17 unit tests 1 / 2	17m 11s
ubuntu-latest jdk-17 unit tests 2 / 2	17m 32s
ubuntu-latest jdk-8 unit tests 1 / 2	24m 0s
ubuntu-latest jdk-8 unit tests 2 / 2	17m 9s
Gradle MacOS integration	18m 10s
Sbt integration	1h 4m 40s
Maven integration	14m 18s
Gradle integration	12m 31s
Scala CLI integration	20m 13s
Mill integration	17m 43s
LSP integration tests	33m 7s
Scala cross tests	1h 4m 43s
Formatting	49s
Scalafix and docs	9m 49s
Sbt-metals/scripted jdk8	2m 14s
Scala javapc tests	2m 59s
Scala3 latest NIGHTLY cross test	5m 11s
MiMa	1m 5s
	7h 21m 10s

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