* Fix Scheduled Reports sent one hour late in daylight saving timezones (#10443)

* convert hour to send report to/from UTC, to ensure it isn't affected by daylight savings

* adds update script to change existing scheduled reports to use utc time

* code improvement

* adds missing param

* Added new event Archiving.makeNewArchiverObject to  allow customising plugin archiving  (#10366)

* added hook to alllow plugin archiving prevention

* cr code style notes

* reworked PR to fit CR suggestions

* added PHPDoc for hook

* Event description more consistent

* UI tests: minor changes

* Adds test checking if all screenshots are stored in lfs

* removed screenshots not stored in lfs

* readds screenshots to lfs

* 2.16.3-b4