Change owner only on copied content

Fixes #5110
Docker-DCO-1.1-Signed-off-by: Alexandr Morozov <lk4d4math@gmail.com> (github: LK4D4)

integration-cli/build_tests/TestAdd/SingleFileToRoot/Dockerfile

@@ -0,0 +1,8 @@
+FROM busybox
+RUN echo 'dockerio:x:1001:1001::/bin:/bin/false' >> /etc/passwd
+RUN echo 'dockerio:x:1001:' >> /etc/group
+RUN touch /exists
+RUN chown dockerio.dockerio /exists
+ADD test_file /
+RUN [ $(ls -l /test_file | awk '{print $3":"$4}') = 'root:root' ]
+RUN [ $(ls -l /exists | awk '{print $3":"$4}') = 'dockerio:dockerio' ]