front: clean allowanceValue type and related code #16751

Job	Run time
Check dockerfiles	13s
Check commits	7s
Build (core-build, core)	14s
Build (editoast, editoast-test)	14s
Build (gateway-test, gateway-standalone, gateway-front)	2m 5s
Check final newline	10s
Check generated railjson sync	19s
Build (front-build, front-tests, front-devel, front-nginx)	2m 7s
Build (osrdyne, osrdyne-test)	14s
Check infra schema sync	14s
Check integration tests	1m 21s
Check osrd schema	41s
Check railjson generator	1m 49s
Check reuse compliance	9s
Check scripts	4s
Check toml	9s
Check editoast lints	0s
Check editoast tests	0s
Check core	0s
Check front rtk sync	0s
Check editoast openapi	0s
Check front	0s
Check gateway	0s
Check osrdyne	0s
Integration tests	0s
End to end tests	0s
	10m 10s

Provide feedback