Update SMSG_ITEM_PUSH_RESULT and SMSG_SELL_RESPONSE for 10.1.7

[Selenium]

• Update SMSG_SELL_RESPONSE structure

Core use Enum and already cast it as int32

• Update SMSG_ITEM_PUSH_RESULT

SMSG_ITEM_PUSH_RESULT change is not present in TrinityCore The changes exist in build 50893