Use pkgconfig BuildRequires for Qt5 packages

Reduces number of needed packages for build

mvidner:
The packages no longer used are:
[    1s] deleting libQt5Concurrent-devel
[    1s] deleting libQt5Concurrent5
[    1s] deleting libQt5DBus-devel
[    1s] deleting libQt5Network-devel
[    1s] deleting libQt5Network5
[    1s] deleting libQt5OpenGL-devel
[    1s] deleting libQt5OpenGL5
[    1s] deleting libQt5PrintSupport-devel
[    2s] deleting libQt5PrintSupport5
[    2s] deleting libQt5Sql-devel
[    2s] deleting libQt5Sql5
[    2s] deleting libQt5Sql5-mysql
[    2s] deleting libQt5Sql5-postgresql
[    2s] deleting libQt5Sql5-sqlite
[    2s] deleting libQt5Sql5-unixODBC
[    2s] deleting libQt5Test-devel
[    2s] deleting libQt5Test5
[    2s] deleting libQt5Xml-devel
[    2s] deleting libQt5Xml5
[    2s] deleting libltdl7
[    2s] deleting libmysqlclient18
[    2s] deleting libpq5
[    2s] deleting libqt5-qtbase-devel
[    2s] deleting libqt5-qtbase-doc
[    2s] deleting libsqlite3-0
[    2s] deleting unixODBC
Fixed <libqt-warning> QFSFileEngine::open: No file name specified
version + changelog