[stable13] Send a proper response for status.php on trusted domain error

[MorrisJobke]

• fixes"Access through untrusted domain" #7732
• backport of Send a proper response for status.php on trusted domain error #7991

I would like to get this in 13. Usually it happens anyways only during installation time and thus backporting to stable12 makes not much sense in my opinion.

@rullzer@nickvergessen Are you fine with 13.0.0 or should it go into 13.0.1?

[MorrisJobke]

I tested it again and it works fine on stable13.

[rullzer]

if we are doing an RC3 that has ~a week to test I'm fine with 13.0.0

[codecov]

Codecov Report

Merging #8029 into stable13 will increase coverage by 0.16%.
The diff coverage is n/a.

@@ Coverage Diff @@## stable13 #8029 +/- ##
=============================================
+ Coverage 51.23% 51.4% +0.16% + Complexity 24976 24974 -2 
=============================================
Files 1607 1599 -8 Lines 95034 94709 -325 Branches 1376 1376 =============================================
- Hits 48691 48681 -10 + Misses 46343 46028 -315

Impacted Files	Coverage Δ	Complexity Δ
lib/public/Util.php
lib/private/Diagnostics/EventLogger.php
lib/private/legacy/template/functions.php
settings/ajax/uninstallapp.php
lib/private/Migration/BackgroundRepair.php
lib/private/User/Session.php
.../public/AppFramework/Http/DataDownloadResponse.php
apps/sharebymail/appinfo/app.php
...s_sharing/lib/Middleware/OCSShareAPIMiddleware.php
core/js/setupchecks.js
... and 3195 more