Add task to verify that QT_VERSION matches the version used in the Qt sources.
Pick-to: 6.11 6.10 6.8
Change-Id: I0065bf3bcda7174a337960f4ec1ac7c403599fcf
Reviewed-by: Ari Parkkila <ari.parkkila@qt.io>
Reviewed-by: Mikko Gronoff <mikko.gronoff@qt.io>