[compiler] Move the InitialScalaBuilder module level builder into the Initial category

#SCL-22172

- This allows the builder to run well ahead of other builders (particularly the JavaBuilder) and be able to set up the compilation environment to Scala projects' advantage.

Author: vasilmkd

scala/compiler-jps/src/org/jetbrains/jps/incremental/scala/InitialScalaBuilder.scala

@@ -19,7 +19,7 @@ import _root_.scala.jdk.CollectionConverters._
 /**
   * For tasks that should be performed once per compilation
   */
-class InitialScalaBuilder extends ModuleLevelBuilder(BuilderCategory.SOURCE_INSTRUMENTER) { //should be before other scala builders
+class InitialScalaBuilder extends ModuleLevelBuilder(BuilderCategory.INITIAL) { //should be before other scala builders
 
   import InitialScalaBuilder._