[tests] add python linter #1190

Job	Run time
Build application (nanos)	1m 39s
Build application (nanos)	1m 41s
Build application (nanosp)	1m 46s
Build application (nanosp)	1m 40s
Build application (nanox)	1m 51s
Build application (nanox)	1m 44s
Build application (stax)	1m 53s
Build application (stax)	1m 55s
Build application (flex)	1m 54s
Build application (flex)	1m 56s
build_docker_tezos_ocaml / Build docker image	16s
build_docker_tezos_ocaml / Build docker image	16s
generate_samples_unit_tests	2m 36s
generate_samples_unit_tests	2m 29s
integration_tests_basic (nanos)	1m 49s
integration_tests_basic (nanos)	2m 0s
integration_tests_basic (nanosp)	1m 52s
integration_tests_basic (nanosp)	2m 3s
integration_tests_basic (nanox)	1m 49s
integration_tests_basic (nanox)	1m 49s
integration_tests_basic (stax)	2m 44s
integration_tests_basic (stax)	2m 41s
integration_tests_basic (flex)	2m 57s
integration_tests_basic (flex)	3m 1s
integration_tests_samples (nanos, micheline)	6m 19s
integration_tests_samples (nanos, micheline)	6m 25s
integration_tests_samples (nanos, operations)	12m 29s
integration_tests_samples (nanos, operations)	12m 1s
integration_tests_samples (nanosp, micheline)	6m 18s
integration_tests_samples (nanosp, micheline)	6m 19s
integration_tests_samples (nanosp, operations)	11m 48s
integration_tests_samples (nanosp, operations)	11m 46s
integration_tests_samples (nanox, micheline)	6m 17s
integration_tests_samples (nanox, micheline)	6m 22s
integration_tests_samples (nanox, operations)	12m 0s
integration_tests_samples (nanox, operations)	11m 46s
	2h 36m 11s

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