Fix console log uses debug (#10139)

This patch updates ConsoleLogHandler to use console.debug() instead of
console.log() for log levels FINE, FINER, and FINEST, ensuring that
these messages are only shown in the "Verbose" tab in browser developer
tools. This aligns with standard browser behavior for log levels.

---------

Co-authored-by: Zbynek Konecny <[email protected]>

Author: larzeni

user/src/com/google/gwt/logging/client/ConsoleLogHandler.java

@@ -57,7 +57,7 @@ public void publish(LogRecord record) {
     } else if (val >= Level.INFO.intValue()) {
       info(msg);
     } else {
-      log(msg);
+      debug(msg);
     }
   }
 
@@ -77,7 +77,7 @@ private native void info(String message) /*-{
     window.console.info(message);
   }-*/;
 
-  private native void log(String message) /*-{
-    window.console.log(message);
+  private native void debug(String message) /*-{
+    window.console.debug(message);
   }-*/;
 }