Replace "Eingabewert" with "Eingabe"
Replace "String" with "Zeichenkette"
Replace "String" with "Zeichenkette"
Replace "Integer" with "Ganzzahl"
Replace "Float" with "Gleitkommazahl"
Fix typo (wärend - während)
Merge branch 'feature/#6481-zend-validate-german-overhaul' into develop

Close #6481
[Http] Add body support for DELETE/OPTIONS request
#6492 - simplified HTTP method name checks, removed duplicate/redundant `elseif` statements
#6492 - using `in_array()` instead of large boolean expression
Merge branch 'hotfix/#6492-support-delete-post-request-body'

Close #6492
Merge branch 'hotfix/#6492-support-delete-post-request-body' into develop

Close #6492
Forward port #6492
#6386 Add Priority system for validators
#6496 #6386 - validator chain should reject invalid callbacks
#6496 #6386 - minor cleanups, simplifying checks around `$callback` validity
#6496 #6386 - adding `@group` annotations for newly introduced tests
#6496 #6386 - inlining `$this->attach()` and `$this->plugin()` calls
#6496 #6386 - reverting minor bc-break (`attach` method should keep a compatible signature)
#6496 #6386 - removing useless test that checks against an invalid type-hint usage
#6496 #6386 - reverting unrelated test changes