Clean up duplications with Dir operation

Clean up duplications with Dir operation

[Issue#]   LINUXWRT-717
[Problem]  Dir operation duplications.
[Cause]    N/A
[Solution] Functionality from
            - wrt-installer/src/jobs/widget_install/directory_api.*
            - wrt-installer/src/jobs/widget_install/task_common.*
            was transferred to wrt-commons/modules/utils/src/path.cpp

It was checked if wrt-installer/src/jobs/widget_install/task_file_manipulation.cpp
contains any duplicate code, and small changes were applied to it.

[SCMRequest] Depends on https://review.tizendev.org/gerrit/#/c/86370/

[Verification] 1. Build repository
               2. Normal installation [wgt]
               3. Normal installation update [wgt]
               4. install wrt-extra on target and run:
                  wrt-installer -i /opt/share/widget/tests/widgetstest/config.xml

Change-Id: If39cf5b184f97fdec2b49908873a2cc6b27f1d5d