testing/gnuradio: disable broken test on aarch64
The upgrade to 3.8.3.1 passed CI but the aarch64 builder gets stuck on the test blocks_qa_gr_top_block
. This MR disables the test on aarch64.
The upgrade to 3.8.3.1 passed CI but the aarch64 builder gets stuck on the test blocks_qa_gr_top_block
. This MR disables the test on aarch64.