Code cleanup: protect all copy constructors (#10750)

* apply regex to change public copy constructors to protected
* cleanup code using now protected constructors
* fix manaBuilder weird casting of Mana into ConditionalMana

Mage/src/main/java/mage/target/Targets.java

@@ -22,7 +22,7 @@ public class Targets extends ArrayList<Target> {
         }
     }
 
-    public Targets(final Targets targets) {
+    protected Targets(final Targets targets) {
         for (Target target : targets) {
             this.add(target.copy());
         }