ptest: use builtin test data

Builtin testdata packages all test data files into resources. This is
used on mobile platforms by default. Enable it for the ptest builds.
We can then remove copying of the source files for the tests.

Change-Id: I5e27b3a3a43ed2993eb5570628f023da3f1ed4d5
Reviewed-by: Ari Parkkila <ari.parkkila@qt.io>
Reviewed-by: Alex Bu <alex.bu@qt.io>

recipes-qt/qt6/qt6-ptest.inc

@@ -33,6 +33,7 @@ EOF
         -DCMAKE_STAGING_PREFIX=${D}${prefix} \
         -DCMAKE_SKIP_RPATH=ON \
         -DQT_DISABLE_NO_DEFAULT_PATH_IN_QT_PACKAGES=ON \
+        -DQT_FORCE_BUILTIN_TESTDATA=ON \
         ${S} \
         -Wno-dev
     ${CMAKE_VERBOSE} cmake --build ${B_PTEST} --target all
@@ -48,9 +49,6 @@ EOF
                 \) -exec sh -c '\
                     install -D "$1" "${D}${PTEST_PATH}${1#${B_PTEST}}" \
                 ' _ {} \;
-
-            # tests may depend on files from sources
-            cp -r ${S}/tests/$tests ${D}${PTEST_PATH}/tests
         fi
     done
 }