core: fix "negative" routing requirements #13417

Job	Run time
check_commits	8s
check_railjson_generator	1m 51s
check_generated_railjson_sync	22s
build (core-build, core)	12s
check_integration_tests	1m 22s
check_osrd_schema	38s
build (editoast, editoast-test)	24s
build (gateway-test, gateway-standalone, gateway-front)	1m 34s
check_toml	6s
build (front-build, front-tests, front-devel, front-nginx)	16s
Check final newline	7s
build (osrdyne, osrdyne-test)	16s
check_infra_schema_sync	13s
check_reuse_compliance	10s
check_core	4m 1s
check_front_rtk_sync	1m 33s
check_editoast_tests	6m 34s
check_editoast_lints	9m 11s
check_editoast_openapi	1m 3s
check_front	2m 38s
check_gateway	3m 24s
check_osrdyne	3m 12s
integration_tests	9m 49s
	49m 4s

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