Adopt WarningLevel from Prism

Author: eregon

src/main/java/org/truffleruby/parser/YARPTranslatorDriver.java

@@ -480,7 +480,10 @@ public static org.prism.ParseResult parseToYARPAST(RubyContext context, RubyLang
             SourceSection section = rubySource.getSource().createSection(location.startOffset, location.length);
             int lineNumber = RubySource.getStartLineAdjusted(context, section);
 
-            rubyWarnings.warning(filename, lineNumber, warning.message);
+            switch (warning.level) {
+                case WARNING_DEFAULT -> rubyWarnings.warn(filename, lineNumber, warning.message);
+                case WARNING_VERBOSE -> rubyWarnings.warning(filename, lineNumber, warning.message);
+            }
         }
 
         if (errors.length != 0) {