K2 Scripting: add support for imported scripts

compiler/ir/ir.tree/gen/org/jetbrains/kotlin/ir/declarations/IrScript.kt

@@ -43,6 +43,8 @@ abstract class IrScript : IrDeclarationBase(), IrDeclarationWithName, IrDeclarat
 
     abstract var earlierScriptsParameter: IrValueParameter?
 
+    abstract var importedScripts: List<IrScriptSymbol>?
+
     abstract var earlierScripts: List<IrScriptSymbol>?
 
     abstract var targetClass: IrClassSymbol?

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrScriptImpl.kt

@@ -53,6 +53,7 @@ class IrScriptImpl(
     override lateinit var providedPropertiesParameters: List<IrValueParameter>
     override var resultProperty: IrPropertySymbol? = null
     override var earlierScriptsParameter: IrValueParameter? = null
+    override var importedScripts: List<IrScriptSymbol>? = null
     override var earlierScripts: List<IrScriptSymbol>? = null
     override var targetClass: IrClassSymbol? = null
     override var constructor: IrConstructor? = null

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/util/DeepCopyIrTreeWithSymbols.kt

@@ -131,6 +131,7 @@ open class DeepCopyIrTreeWithSymbols(
         ).also { scriptCopy ->
             scriptCopy.thisReceiver = declaration.thisReceiver?.transform()
             declaration.statements.mapTo(scriptCopy.statements) { it.transform() }
+            scriptCopy.importedScripts = declaration.importedScripts
             scriptCopy.earlierScripts = declaration.earlierScripts
             scriptCopy.earlierScriptsParameter = declaration.earlierScriptsParameter
             scriptCopy.explicitCallParameters = declaration.explicitCallParameters.memoryOptimizedMap { it.transform() }

compiler/ir/ir.tree/tree-generator/src/org/jetbrains/kotlin/ir/generator/IrTree.kt

@@ -548,6 +548,7 @@ object IrTree : AbstractTreeBuilder() {
         +listField("providedPropertiesParameters", valueParameter, mutability = Var, isChild = true)
         +field("resultProperty", propertySymbolType, nullable = true)
         +field("earlierScriptsParameter", valueParameter, nullable = true, isChild = true)
+        +listField("importedScripts", scriptSymbolType, mutability = Var, nullable = true)
         +listField("earlierScripts", scriptSymbolType, mutability = Var, nullable = true)
         +field("targetClass", classSymbolType, nullable = true)
         +field("constructor", constructor, nullable = true) // K1