ci: add dco check #10769

Job	Run time
check_commits	5s
build (core-build, core)	13s
build (editoast, editoast-test)	14s
check_integration_tests	1m 25s
check_generated_railjson_sync	22s
check_osrd_schema	43s
build (gateway-test, gateway-standalone, gateway-front)	2m 44s
build (front-build, front-tests, front-devel, front-nginx)	2m 49s
check_railjson_generator	1m 48s
check_toml	8s
build (osrdyne, osrdyne-test)	13s
Check final newline	18s
check_dco	4s
check_infra_schema_sync	15s
check_reuse_compliance	11s
check_front_rtk_sync	1m 42s
check_editoast_lints	5m 20s
check_core	4m 16s
check_editoast_tests	4m 15s
check_editoast_openapi	1m 25s
check_front	2m 48s
check_gateway	2m 15s
check_osrdyne	2m 44s
integration_tests	9m 58s
	46m 15s

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