Port from Phonon to Qt Multimedia

Bohdan Onofriichukrequested to merge
work/littlesweet/remove_phonon into master

Based on !1168 (closed) which is based on !808, but switched from QVideoWidget to QGraphicsVideoItem which fixes a Wayland issue where video could render outside page/window bounds.

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Edited by Bohdan Onofriichuk

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