Various tests were adapted to Q_OS_WIN to take account of the
deficiencies in its TZ APIs; which are now bypassed when ICU is
configured, as we use it instead. Replace some #if-ery on a local
define with QT_CONFIG(icu) and QMAKE_USE_PRIVATE += icu here, to match
in corelib/tools/tools.pri
Task-number: QTBUG-66367
Change-Id: Ia93abdeb7d12046310f0bb4a78c2669f8eecbbc2
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
bc008afb0e