[5.6] Fix whereTime method for SQLiteGrammar with correct formatting.

[pinguinjkeke]

strftime('time', created_at) is not working for sqlite and we need to apply correct formatting %H:%M:%S.

Currently, ->whereTime() method does nothing and no filtering is performed.
SQLite's strftime function accepts formatting string. Passing 'time' to it returns 'time' string instead of expected %H:%M:%S formatted time string.
In example, comparing 'time' string and provided time like '12:00' does nothing.

It's a bug. ->whereTime() function doesn't works as expected when using sqlite. So, it should be merged to 5.5 LTS too, I think.

You can read more about sqlite date functions here: https://www.sqlite.org/lang_datefunc.html

[sisve]

Could we perhaps get the PR for 5.5 reopened and merged too? #23316

[pinguinjkeke]

@sisve yeah, it would be cool