To avoid big artifact sizes, strip the binaries and libraries upon
installation. This achieves stripping similar to QTBUG-69767 and
QTBUG-81301 but arguably in a cleaner CMake way.
See comment on PS34 of the unmerged commit
90b09fee44b08b65a436fd15fda2526e242f7b21 for details.
Task-number: QTBUG-86053
Change-Id: I3ed929a8a7c74b88c480543212fc9551d8bde77f
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>