Fix Spigot annotation mistakes

while some of these may of been true, they are extreme cases and cause
a ton of noise to plugin developers.

Use ApiStatus.Internal instead of Deprecated for actual internal API
that continues to have use (internally).

These do not help plugin developers if they bring moise noise than value.

paper-api/src/main/java/org/bukkit/event/raid/RaidSpawnWaveEvent.java

@@ -19,7 +19,7 @@ public class RaidSpawnWaveEvent extends RaidEvent {
     private final List<Raider> raiders;
     private final Raider leader;
 
-    public RaidSpawnWaveEvent(@NotNull Raid raid, @NotNull World world, @Nullable Raider leader, @NotNull List<Raider> raiders) {
+    public RaidSpawnWaveEvent(@NotNull Raid raid, @NotNull World world, @NotNull Raider leader, @NotNull List<Raider> raiders) { // Paper
         super(raid, world);
         this.raiders = raiders;
         this.leader = leader;
@@ -30,7 +30,7 @@ public class RaidSpawnWaveEvent extends RaidEvent {
      *
      * @return {@link Raider}
      */
-    @Nullable
+    @NotNull // Paper
     public Raider getPatrolLeader() {
         return leader;
     }