I was told this is 32-bit-only code in Qt 5, where it didn't really
matter, because only QStringView could handle > INT_MAX character
strings. Put up a big stop sign now in Qt 6 to enforce that this
information is correct, incl. notes for when it turns out it isn't.
Pick-to: 6.4 6.3 6.2 5.15
Task-number: QTBUG-59150
Task-number: QTBUG-103531
Change-Id: I4620a43e2e67776cc67531fa993a7bb8e01cffed
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Sona Kurazyan <sona.kurazyan@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>