Clean up triggered ability text generation (#10627)

* move "or battle" to its own class

* move "or planeswalker" to its own class

* remove strange way of setting custom text

* finally remove getTriggerPhrase

* copy constructor visibility

* fix Vraska

Mage/src/main/java/mage/abilities/TriggeredAbility.java

@@ -58,12 +58,5 @@ public interface TriggeredAbility extends Ability {
 
     GameEvent getTriggerEvent();
 
-    /**
-     * Don't override this. Use setTriggerPhrase instead and let the base class handle it.
-     * @return
-     */
-    @Deprecated
-    String getTriggerPhrase();
-
     TriggeredAbility setTriggerPhrase(String triggerPhrase);
 }