Move of openqa.opensuse.org to new datacenter on 2023-07-19 - Expect unavailability and reduced test capacities

Heads up to all users of https://openqa.opensuse.org : The virtual machine serving the webUI and main controlling openQA instance behind that will be moved to a shiny new SUSE datacenter next Wednesday, 2023-07-19. Expect the system to be unavailable for the majority of the day and reduced test capacities for the days after that. Find more details on https://progress.opensuse.org/issues/132143