meson: do not build gst test in static mode
In the case of gstreamer test, the symbol gst_init_static_plugins needed by gstreamer will be available at the end of the build with gstreamer-full library.
Needed by gstreamer/gstreamer!4128 (merged)
In the case of gstreamer test, the symbol gst_init_static_plugins needed by gstreamer will be available at the end of the build with gstreamer-full library.
Needed by gstreamer/gstreamer!4128 (merged)