This should be enough to fix SLE-11722

- Add patch so the renaming of QtDataVisualization doesn't cause
a problem on applications using the old name
(gh#spyder-ide/qtpy#228):
* 0001-Add-QtDatavisualization-alias-to-QtDataVisualization.patch

- Add also BuildRequires for qt3d-qt5 and qtdatavis3d-qt5 so
those tests are not skipped.
- qtcharts-qt5 is not added because the python-qt5 package is
always pulled in automatically and QtPy uses it by default
while QtCharts is only available with PySide2.
- Replace the Requires with Recommends since not even PyQt is
really required (PySide2 can also be used with QtPy, and is now
added as a Suggested package).
- Rename QtDatavisualization.py to QtDataVisualization.py
(uppercase v) to fix the test which was skipped because the
imported module didn't exist and to keep the name consistent
with both PyQt and PySide2 (gh#spyder-ide/qtpy#228)

- BuildRequires (and Require) the webengine bindings so it uses
them (which is the default) instead of using qtwebkit (which
was used only as a fallback).

- SIP is only used for PyQt4 which we don't use