front: add logic to handle non-feasibility in stdcm simulations #3

Job	Run time
check_infra_schema_sync	19s
build (core-build, core)	10s
build (editoast, editoast-test)	9s
check_generated_railjson_sync	29s
build (gateway-test, gateway-standalone, gateway-front)	15s
check_integration_tests	1m 21s
build (front-build, front-tests, front-devel, front-nginx)	12s
check_commits	7s
check_osrd_schema	49s
check_railjson_generator	1m 45s
build (osrdyne, osrdyne-test)	10s
check_reuse_compliance	10s
check_toml	5s
Check final newline	7s
check_editoast_tests	0s
check_editoast_lints	0s
check_core	0s
check_editoast_openapi	0s
check_front	0s
check_gateway	0s
check_osrdyne	0s
check_front_rtk_sync	0s
integration_tests	0s
	6m 8s

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