graphics/py-python-poppler-qt5: Fix build: Cannot import 'sipbuild.api'

Traceback (most recent call last):

File "/usr/local/lib/python3.11/site-packages/pyproject_hooks/_impl.py", line 402, in _call_hook
  raise BackendUnavailable(

pyproject_hooks._impl.BackendUnavailable: Cannot import 'sipbuild.api'

ERROR Backend 'sipbuild.api' is not available.

• Add missing build dependency needed after recent changes to the python

build infrastructure.

• Replace BUILD_DEPENDS=qmake-qt5:devel/qt5-qmake with USE_QT=qmake:build.

PR: 282439
Approved by: Martin Neubauer <m.ne@gmx.net> (maintainer)
MFH: 2024Q4

(cherry picked from commit 44ad61e37714426abdc08edfa11cfa6d739bada9)