[Quest API] Add Spawn2 Class to Perl (#3456)

# Perl
- Add `$spawn->Depop()`.
- Add `$spawn->Disable()`.
- Add `$spawn->Enable()`.
- Add `$spawn->ForceDespawn()`.
- Add `$spawn->GetCurrentNPCID()`.
- Add `$spawn->GetHeading()`.
- Add `$spawn->GetID()`.
- Add `$spawn->GetKillCount()`.
- Add `$spawn->GetRespawnTimer()`.
- Add `$spawn->GetSpawnCondition()`.
- Add `$spawn->GetSpawnGroupID()`.
- Add `$spawn->GetVariance()`.
- Add `$spawn->GetX()`.
- Add `$spawn->GetY()`.
- Add `$spawn->GetZ()`.
- Add `$spawn->IsEnabled()`.
- Add `$spawn->IsNPCPointerValid()`.
- Add `$spawn->LoadGrid()`.
- Add `$spawn->Repop()`.
- Add `$spawn->Repop(delay)`.
- Add `$spawn->Reset()`.
- Add `$spawn->SetCurrentNPCID(npc_id)`.
- Add `$spawn->SetNPCPointer(npc_pointer)`.
- Add `$spawn->SetRespawnTimer(new_respawn_time)`.
- Add `$spawn->SetTimer(duration)`.
- Add `$spawn->SetVariance(variance)`.

# Notes
- Adds support for Spawn2 class to Perl.

zone/CMakeLists.txt

@@ -119,6 +119,7 @@ SET(zone_sources
     perl_player_corpse.cpp
     perl_questitem.cpp
     perl_raids.cpp
+    perl_spawn.cpp
     perl_spell.cpp
     perlpacket.cpp
     petitions.cpp