[CLI] reduce memory usage for compiler settings

make write protection directly in properties
it creates no additional wrapper with the link to the containing class
for ij project, this reduces memory usage for ~15 mb

^KT-56351

jps/jps-common/src/org/jetbrains/kotlin/config/CompilerSettings.kt

@@ -20,11 +20,31 @@ import com.intellij.openapi.util.text.StringUtil
 import org.jetbrains.kotlin.cli.common.arguments.Freezable
 
 class CompilerSettings : Freezable() {
-    var additionalArguments: String by FreezableVar(DEFAULT_ADDITIONAL_ARGUMENTS)
-    var scriptTemplates: String by FreezableVar("")
-    var scriptTemplatesClasspath: String by FreezableVar("")
-    var copyJsLibraryFiles: Boolean by FreezableVar(true)
-    var outputDirectoryForJsLibraryFiles: String by FreezableVar(DEFAULT_OUTPUT_DIRECTORY)
+    var additionalArguments: String = DEFAULT_ADDITIONAL_ARGUMENTS
+        set(value) {
+            checkFrozen()
+            field = value
+        }
+    var scriptTemplates: String = ""
+        set(value) {
+            checkFrozen()
+            field = value
+        }
+    var scriptTemplatesClasspath: String = ""
+        set(value) {
+            checkFrozen()
+            field = value
+        }
+    var copyJsLibraryFiles = true
+        set(value) {
+            checkFrozen()
+            field = value
+        }
+    var outputDirectoryForJsLibraryFiles: String = DEFAULT_OUTPUT_DIRECTORY
+        set(value) {
+            checkFrozen()
+            field = value
+        }
 
     companion object {
         val DEFAULT_ADDITIONAL_ARGUMENTS = ""

jps/jps-common/src/org/jetbrains/kotlin/config/JpsPluginSettings.kt

@@ -9,5 +9,9 @@ import org.jetbrains.kotlin.cli.common.arguments.Freezable
 
 class JpsPluginSettings : Freezable() {
     @Suppress("unused") // Used in Kotlin plugin
-    var version: String by FreezableVar("") // KTIJ-20555 Fix default value?
+    var version: String = "" // KTIJ-20555 Fix default value?
+        set(value) {
+            checkFrozen()
+            field = value
+        }
 }