[QT6] Add dynamic-layer and fix qtbase on xWayland

Import qt6-layer/recipes-qt from the official NXP reference project.

This recipes appends also fix qtbase's compilation error when compiling with xWayland backend:

qtbase/6.5.2-r0/git/src/gui/opengl/platform/unix/qglxconvenience.cpp:282: undefined reference to `glXGetFBConfigAttrib'