Add cocotb testbench runner #1300

Job	Run time
cocotb_test	0s
make_boot / make_boot (zynq, PandABox-no-fmc)	54m 28s
make_boot / make_boot (zynqmp, xu5_st1-no-fmc)	1h 51m 19s
make_zpkg / make_zpkg (PandABox-no-fmc)	1h 10m 9s
make_boot / make_boot (zynqmp, PandABrick)	1h 18m 23s
test_matrix / test_matrix	1m 29s
make_zpkg / make_zpkg (PandABox-fmc_24vio)	1h 8m 56s
make_zpkg / make_zpkg (PandABox-fmc_acq427)	1h 0m 34s
test_python_autogen / test_python_autogen	4m 10s
make_zpkg / make_zpkg (PandABox-fmc_acq430)	59m 23s
make_zpkg / make_zpkg (PandABox-fmc_lback-sfp_lback)	1h 2m 24s
make_zpkg / make_zpkg (PandABrick)	1h 15m 57s
make_zpkg / make_zpkg (xu5_st1-no-fmc)	47m 50s
make_zpkg / make_zpkg (xu5_st1-fmc_acq430)	1h 3m 22s
test_hdl / test (pcap pgen)	48m 18s
test_hdl / test (seq posenc clock)	53m 37s
test_hdl / test (pcomp lut div bits)	51m 45s
test_hdl / test (counter filter calc)	43m 20s
test_hdl / test (pulse srgate qdec)	52m 50s
release / release	0s
	16h 48m 14s

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