front: refacto old e2e tests #12758

Job	Run time
check_commits	8s
check_railjson_generator	1m 53s
check_generated_railjson_sync	25s
build (core-build, core)	17s
build (editoast, editoast-test)	14s
build (gateway-test, gateway-standalone, gateway-front)	1m 31s
check_integration_tests	1m 21s
check_osrd_schema	39s
build (front-build, front-tests, front-devel, front-nginx)	18s
build (osrdyne, osrdyne-test)	14s
Check final newline	20s
check_infra_schema_sync	14s
check_reuse_compliance	13s
check_toml	9s
check_editoast_lints	8m 45s
check_front_rtk_sync	1m 26s
check_core	3m 56s
check_editoast_tests	6m 45s
check_editoast_openapi	1m 2s
check_front	2m 24s
check_gateway	3m 19s
check_osrdyne	3m 18s
integration_tests	21m 36s
	1h 0m 27s

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