When the dots tracer is detected among active tracers, switch from
SHOW_ALL to SHOW_FULL_PARAMS to prevent parameter ellipsization.
The dots tracer is designed to work with gst-dots-viewer which can
handle long parameter values, so we preserve the full text in dot files.
This improves the viewing experience when using the dots tracer with
the gst-dots-viewer tool.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9547>
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