chore(Core/Misc): update floor and ceil to std (#19837)

src/server/scripts/Spells/spell_generic.cpp

@@ -35,6 +35,7 @@
 #include "Unit.h"
 #include "Vehicle.h"
 #include <array>
+#include <cmath>
 /*
  * Scripts for spells with SPELLFAMILY_GENERIC which cannot be included in AI script file
  * of creature using it or can't be bound to any player class.
@@ -4255,7 +4256,7 @@ class spell_gen_gift_of_naaru : public AuraScript
                 break;
         }
 
-        int32 healTick = floor(heal / aurEff->GetTotalTicks());
+        int32 healTick = std::floor(heal / aurEff->GetTotalTicks());
         amount += int32(std::max(healTick, 0));
     }