front: drop formatDurationAsISO8601() #17441

Job	Run time
Build (core-build, core)	26s
Check commits	6s
Build (editoast, editoast-test)	28s
Build (gateway-test, gateway-standalone, gateway-front)	2m 16s
Build (front-build, front-tests, front-devel, front-nginx)	2m 33s
Check dockerfiles	14s
Build (osrdyne, osrdyne-test)	22s
Check generated railjson sync	25s
Check scripts	5s
Check final newline	8s
Check integration tests	1m 27s
Check osrd schema	45s
Check railjson generator	1m 54s
Check infra schema sync	21s
Check reuse compliance	10s
Check toml	5s
Check front rtk sync	1m 12s
Check editoast tests	7m 2s
Check editoast lints	8m 50s
Check core	4m 14s
Check editoast openapi	35s
Check front	3m 14s
Check gateway	3m 20s
Check osrdyne	3m 58s
End to end tests	14m 54s
Integration tests	1m 21s
	1h 0m 25s

Provide feedback