Add cocotb testbench runner #1308

Job	Run time
cocotb_test / cocotb_test	2m 45s
make_boot / make_boot (zynq, PandABox-no-fmc)	42m 48s
make_boot / make_boot (zynqmp, xu5_st1-no-fmc)	1h 36m 23s
make_boot / make_boot (zynqmp, PandABrick)	1h 36m 19s
make_zpkg / make_zpkg (PandABox-no-fmc)	55m 20s
make_zpkg / make_zpkg (PandABox-fmc_24vio)	1h 2m 15s
test_matrix / test_matrix	2m 33s
make_zpkg / make_zpkg (PandABox-fmc_acq427)	1h 11m 56s
make_zpkg / make_zpkg (PandABox-fmc_acq430)	1h 10m 17s
make_zpkg / make_zpkg (PandABox-fmc_lback-sfp_lback)	49m 28s
make_zpkg / make_zpkg (PandABrick)	1h 9m 39s
test_python_autogen / test_python_autogen	3m 7s
make_zpkg / make_zpkg (xu5_st1-no-fmc)	39m 58s
make_zpkg / make_zpkg (xu5_st1-fmc_acq430)	50m 2s
test_hdl / test (pcap pgen)	58m 33s
test_hdl / test (seq posenc clock)	48m 35s
test_hdl / test (pcomp lut div bits)	53m 53s
test_hdl / test (counter filter calc)	45m 40s
test_hdl / test (pulse srgate qdec)	50m 48s
release	0s
	16h 10m 19s

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