Reworking triggered ability text generation to allow for ability words and flavor words to be added more easily (#8010)

* refactor all instances of getRule in triggered abilities using new getTriggerPrefix method

* updated triggered ability rules generation

* renamed method

* fixed a test failure

* some more refactoring

* simplified some instances of ability word usage

Mage/src/main/java/mage/abilities/common/BecomesBlockedByCreatureTriggeredAbility.java

@@ -52,10 +52,10 @@ public class BecomesBlockedByCreatureTriggeredAbility extends TriggeredAbilityIm
     }
 
     @Override
-    public String getRule() {
+    public String getTriggerPhrase() {
         return "Whenever {this} becomes blocked by "
                 + (filter.getMessage().startsWith("an ") ? "" : "a ")
-                + filter.getMessage() + ", " + super.getRule();
+                + filter.getMessage() + ", " ;
     }
 
     @Override