PWA: Respect the screen rotation settings of the user device

summary

The screen rotation settings of the user device must be respected.

Users use GitLab on a variety of devices. It would be reasonable to respect the settings on the device itself, without constantly rotating the PWA application.

fix

delete this line: https://gitlab.com/gitlab-org/gitlab/-/blob/master/app/views/pwa/manifest.json.erb?ref_type=heads#L9