[Orchestrator] - taskGateway verify schedule strtotime issues

There is a small issue converting string time such as 20240408083000 into a unix timestamp

strtotime does not report erros but cannot understand the above format correctly.

It would better to first transform above string into a dateTime object (making sure not timezone is affecting the transformation). The transform the time object into a unix format for verification.

As of now, schedule works a on a day by day, it can cause issues if local timezone is not in UTC and therefore hours won't match.

To be fixed asap.