The ${QT_SOURCE_TREE}/src/network include paths of several tests are
apparently not needed anymore. Remove those.
tst_qfilesystementry and tst_qfreelist are the only tests that actually
need to reference files in qtbase's source tree. Simply use the paths
relative to the project file.
Task-number: QTBUG-88090
Change-Id: Ic6f341e001338c1b07dce6e58316245bc9560c5e
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>