[CLI] K2JVMCompilerArguments: Model classpath as Array<String>

to allow interning individual file-path arguments on the IDE

KTIJ-24976

compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArgumentsCopyGenerated.kt

@@ -17,7 +17,7 @@ fun copyK2JVMCompilerArguments(from: K2JVMCompilerArguments, to: K2JVMCompilerAr
     to.assertionsMode = from.assertionsMode
     to.backendThreads = from.backendThreads
     to.buildFile = from.buildFile
-    to.classpath = from.classpath
+    to.classpath = from.classpath?.copyOf()
     to.compileJava = from.compileJava
     to.declarationsOutputPath = from.declarationsOutputPath
     to.defaultScriptExtension = from.defaultScriptExtension

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/K2JVMCompilerArguments.kt

@@ -26,9 +26,10 @@ class K2JVMCompilerArguments : CommonCompilerArguments() {
         value = "-classpath",
         shortName = "-cp",
         valueDescription = "<path>",
-        description = "List of directories and JAR/ZIP archives to search for user class files"
+        description = "List of directories and JAR/ZIP archives to search for user class files",
+        delimiter = Argument.Delimiters.pathSeparator
     )
-    var classpath: String? = null
+    var classpath: Array<String>? = null
         set(value) {
             checkFrozen()
             field = if (value.isNullOrEmpty()) null else value