build

front: bump @typescript-eslint/eslint-plugin from 8.20.0 to 8.21.0 in /front #17959

Job	Run time
Check dockerfiles	9s
Build (core-build, core)	16s
Build (editoast, editoast-test)	24s
Build (gateway-test, gateway-standalone, gateway-front)	3m 12s
Build (front-build, front-tests, front-devel, front-nginx)	3m 17s
Check generated railjson sync	22s
Build (osrdyne, osrdyne-test)	16s
Check commits	9s
Check final newline	12s
Check infra schema sync	16s
Check integration tests	1m 20s
Check osrd schema	39s
Check reuse compliance	9s
Check scripts	4s
Check toml	4s
Check railjson generator	1m 54s
Check editoast lints	8m 14s
Check core	4m 21s
Check editoast tests	6m 57s
Check editoast openapi	43s
Check front	3m 21s
Check gateway	3m 27s
Check osrdyne	3m 40s
End to end tests	27m 47s
Integration tests	1m 1s
Check front rtk sync	1m 13s
	1h 13m 27s

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