distinguish between schema.Time and tag time

[black-06]

• [x] Do only one thing
• [x] Non breaking API changes
• [ ] Tested

What did this pull request do?

fix https://github.com/go-gorm/gorm/issues/6033

User Case Description

type Test struct {
    Date time.Time `gorm:"type:date"`
    Time time.Time `gorm:"type:time"`
    DefaultDateTime time.Time
}

CREATE TABLE `tests` (`date` date,`time` time,`default_date_time` datetime)