core: use infra explorer in pathfinding endpoint #12737

Job	Run time
check_generated_railjson_sync	23s
build (core-build, core)	2m 28s
build (editoast, editoast-test)	26m 8s
check_railjson_generator	1m 50s
build (gateway-test, gateway-standalone, gateway-front)	13m 6s
build (front-build, front-tests, front-devel, front-nginx)	19s
check_commits	9s
build (osrdyne, osrdyne-test)	12m 16s
check_infra_schema_sync	15s
check_integration_tests	1m 30s
check_osrd_schema	45s
check_toml	5s
Check final newline	8s
check_reuse_compliance	9s
check_front_rtk_sync	1m 30s
check_core	3m 59s
check_editoast_tests	6m 14s
check_editoast_lints	9m 2s
check_editoast_openapi	1m 19s
check_front	2m 36s
check_gateway	3m 26s
check_osrdyne	3m 7s
integration_tests	8m 48s
	1h 39m 32s

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