Fix sprite generation directory #19599

Job	Run time
Check dockerfiles	8s
Check railjson generator	27s
Build (core-build, core)	16s
Check generated railjson sync	25s
Check scripts	5s
Build (editoast, editoast-test)	8m 57s
Check commits	10s
Check final newline	15s
Check infra schema sync	16s
Build (gateway-test, gateway-standalone, gateway-front)	3m 6s
Build (front-tests)	2m 46s
Check integration tests	1m 23s
Build (osrdyne, osrdyne-test)	17s
Check osrd schema	22s
Check reuse compliance	11s
Check toml	4s
Check core	4m 22s
Check editoast lints	8m 46s
Check front rtk sync	1m 13s
Check editoast tests	7m 2s
Check editoast openapi	43s
Check gateway	3m 28s
Check osrdyne	3m 40s
Check front	3m 12s
End to end tests	8m 16s
Integration tests	1m 6s
	1h 0m 56s

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