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

to allow interning individual file-path arguments on the IDE

KTIJ-24976

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/compiler/cliCompilerUtils.kt

@@ -174,7 +174,7 @@ fun writeOutputsIfNeeded(
 
 fun ModuleBuilder.configureFromArgs(args: K2JVMCompilerArguments) {
     args.friendPaths?.forEach { addFriendDir(it) }
-    args.classpath?.split(File.pathSeparator)?.forEach { addClasspathEntry(it) }
+    args.classpath?.forEach { addClasspathEntry(it) }
     args.javaSourceRoots?.forEach {
         addJavaSourceRoot(JavaRootPath(it, args.javaPackagePrefix))
     }

compiler/cli/src/org/jetbrains/kotlin/cli/jvm/jvmArguments.kt

@@ -179,7 +179,7 @@ fun CompilerConfiguration.configureJavaModulesContentRoots(arguments: K2JVMCompi
 }
 
 fun CompilerConfiguration.configureContentRootsFromClassPath(arguments: K2JVMCompilerArguments) {
-    for (path in arguments.classpath?.split(File.pathSeparatorChar).orEmpty()) {
+    for (path in arguments.classpath.orEmpty()) {
         add(CLIConfigurationKeys.CONTENT_ROOTS, JvmClasspathRoot(File(path)))
     }
 }