[BUGFIX] Use HTTP Status 307 for all page shortcut modes

Fixes cases where the shortcut page is cached by some
devices leading to exceptions or wrong behaviour.

Resolves: #56423
Releases: 6.2
Change-Id: I71252b13320417ecffa9c28db6af9476d667d58f
Reviewed-on: https://review.typo3.org/27933
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers
Reviewed-by: Markus Klein
Tested-by: Markus Klein