refactor(interactive): Rename two temporal types, Date and Day to TimeStamp and Date

[zhanglei1949]

Currently Interactive support two temporal data types,

• Date
• Day

However, the naming of these two types doesn't really match its implementation. The struct Date actually stores a timestamp(in million second), the struct Day actually stores a Date(Year, Month and Day).

• This PR will also change the the data type usage in graph schema.
• This PR may affect the previously written stored procedures, where set_day and set_date maybe used. Should be changed to set_date and set_timestamp.