Support NTFS hidden files

Summary:
This patch implements function isHiddenNtfs which checks extended attribute HIDDEN of files from NTFS partitions and populates UDSEntry with KIO::UDSEntry::UDS_HIDDEN.
FEATURE: 171537

Test Plan:

1. Open Dolphin on Windows partition
2. Check that "$Recycle.Bin", "MSOCache", "System Volume Information", etc. are hidden
3. Show hidden files
4. Check that Windows hidden files are displayed now

Reviewers: Dolphin, Frameworks, markg, dfaure

Reviewed By: dfaure

Subscribers: dfaure, markg, elvisangelaccio, ltoscano, anthonyfieroni, broulik, Frameworks, Dolphin

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D11204