[Quest API] Add Time String to Seconds Method to Perl/Lua. (#2580)

* [Quest API] Add Time String to Seconds Method to Perl/Lua.

# Perl
- Add `quest::timetoseconds(time_string)`.

# Lua
- Add `eq.time_to_seconds(time_string)`.

# Notes
- Allows operators to use this method in place of hardcoded values like `3600`.

* Remove unused method.

zone/data_bucket.h

@@ -18,7 +18,6 @@ public:
 	static std::string GetDataRemaining(std::string bucket_key);
 private:
 	static uint64 DoesBucketExist(std::string bucket_key);
-	static uint32 ParseStringTimeToInt(std::string time_string);
 };