Fix most unchecked/deprecation javac warnings in compiler modules

core/reflection.jvm/src/kotlin/reflect/jvm/internal/Util.java

@@ -6,6 +6,7 @@
 package kotlin.reflect.jvm.internal;
 
 /* package */ class Util {
+    @SuppressWarnings("unchecked")
     public static Object getEnumConstantByName(Class<? extends Enum<?>> enumClass, String name) {
         // This is a workaround for KT-5191. Enum#valueOf cannot be called in Kotlin
         return Enum.valueOf((Class) enumClass, name);