Provide clues when configuration is unrecognized #9664

* Configuration might not be recognized due to missing extension dependencies.
* Improve warning message to provide such hint.

Author: galderz

core/runtime/src/main/java/io/quarkus/runtime/configuration/ConfigDiagnostic.java

@@ -48,7 +48,7 @@ public static void deprecated(String name) {
     }
 
     public static void unknown(String name) {
-        log.warnf("Unrecognized configuration key \"%s\" was provided; it will be ignored", name);
+        log.warnf("Unrecognized configuration key \"%s\" was provided; it will be ignored; verify that the dependency extension for this configuration is set or you did not make a typo", name);
     }
 
     public static void unknown(NameIterator name) {
@@ -58,7 +58,7 @@ public static void unknown(NameIterator name) {
     public static void unknownRunTime(String name) {
         if (ImageInfo.inImageRuntimeCode()) {
             // only warn at run time for native images, otherwise the user will get warned twice for every property
-            log.warnf("Unrecognized configuration key \"%s\" was provided; it will be ignored", name);
+            log.warnf("Unrecognized configuration key \"%s\" was provided; it will be ignored; verify that the dependency extension for this configuration is set or that you did not make a typo", name);
         }
     }