Add cocotb testbench runner #1315

Job	Run time
make_zpkg / make_zpkg (PandABox-no-fmc)	1h 13m 38s
make_zpkg / make_zpkg (PandABox-fmc_24vio)	1h 11m 53s
cocotb_test / cocotb_test	11m 45s
make_zpkg / make_zpkg (PandABox-fmc_acq427)	1h 23m 13s
make_zpkg / make_zpkg (PandABox-fmc_acq430)	1h 20m 30s
make_boot / make_boot (zynq, PandABox-no-fmc)	4h 19m 28s
make_zpkg / make_zpkg (PandABox-fmc_lback-sfp_lback)	1h 6m 4s
make_boot / make_boot (zynqmp, xu5_st1-no-fmc)	5h 23m 29s
make_zpkg / make_zpkg (PandABrick)	1h 18m 49s
make_boot / make_boot (zynqmp, PandABrick)	5h 23m 40s
make_zpkg / make_zpkg (xu5_st1-no-fmc)	52m 33s
make_zpkg / make_zpkg (xu5_st1-fmc_acq430)	1h 7m 7s
test_matrix / test_matrix	1m 54s
test_python_autogen / test_python_autogen	2m 13s
test_hdl / test (pcap pgen)	49m 29s
test_hdl / test (seq posenc clock)	44m 31s
test_hdl / test (pcomp lut div bits)	43m 6s
test_hdl / test (counter filter calc)	44m 21s
test_hdl / test (pulse srgate qdec)	45m 7s
release / release	0s
	1d 4h 42m 50s

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