Fixes #37069 - Fallback to UTC on invalid timezone

[ofedoren]

No description provided.

[sbernhard]

Nice PR for the 10.000 PR :-)

[evgeni]

[test katello]

[adamruzicka]

Nice and clean, as the 10000th pr should be

[adamruzicka]

[test katello] for a good measure

[adamruzicka]

The only failure in katello test suite is

[2024-03-15T11:49:44.233Z] unsatisfied expectations:
[2024-03-15T11:49:44.233Z] - expected exactly once, invoked twice: #<Katello::Api::V2::ContentViewVersionsController:0x8cca80>.async_task(Actions::Katello::ContentView::Promote, #<Katello::ContentViewVersion:0x8ccb70>, [#<Katello::KTEnvironment:0x8ccb98>], false, nil)

It can't possibly be caused by this change, merging.

[adamruzicka]

Thank you @ofedoren and sorry for the wait