Spark day of month

- Spark last day of month
- Spark first day of month
- Spark sql day of month
- Spark sql first day of month
- Spark sql last day of month
- Spark get last day of month
- Spark scala first day of month
- Spark scala last day of month
- Spark sql get first day of month
- Spark sql last day of previous month
- Spark sql first day of current month