community/qt5-qtbase-opengles: new aport
Rename qt5-qtbase, qt5-qtdeclarative and py3-qt5 to $pkgname-opengl, and make them provide $pkgname. Then add new aports for those aforementioned 3 packages as $pkgname-opengles, and also make them provide $pkgname. Now users can choose if they want desktop GL or OpenGLES on arm*, but can some packages also explicitly depend on the OpenGLES versions when required (e.g. KDE Plasma).