Use rz_pvector_foreach_cpp for bf->o->sections

[kazarmy]

This pr fixes the following error in the Rizin CI build, likely due to rizinorg/rizin#4089:

(https://github.com/rizinorg/rizin/actions/runs/7508868696/job/20446293652#step:9:11855)

[XVilka]

Cutter also needs to be fixed afterwards:

 #9 ERROR: process "/bin/sh -c cd /root && \tgit clone --recurse-submodules --depth 1 https://github.com/rizinorg/cutter && \tcd cutter && \tcmake -Bbuild -GNinja -DCUTTER_USE_BUNDLED_RIZIN=OFF -DCMAKE_INSTALL_PREFIX=/usr && \tninja -C build && \tninja -C build install" did not complete successfully: exit code: 1
------
 > [5/5] RUN cd /root && 	git clone --recurse-submodules --depth 1 https://github.com/rizinorg/cutter && 	cd cutter && 	cmake -Bbuild -GNinja -DCUTTER_USE_BUNDLED_RIZIN=OFF -DCMAKE_INSTALL_PREFIX=/usr && 	ninja -C build && 	ninja -C build install:
26.16 ../src/core/Cutter.cpp: In member function 'QList<SegmentDescription> CutterCore::getAllSegments()':
26.16 ../src/core/Cutter.cpp:3497:56: error: cannot convert 'RzPVector*' {aka 'rz_pvector_t*'} to 'RzList*' {aka 'rz_list_t*'} in initialization
26.16      RzList *segments = rz_bin_object_get_segments(bf->o);
26.16                                                         ^

[kazarmy]

Okay