chore(deps): update eslint monorepo to v9.21.0 #45924

Job	Run time
api-check-needed	6s
frontend-check-needed	4s
Lint: ClientPrint (ESLint)	15s
e2e-check-needed	5s
Tests: PDF	28s
Lint: Print (ESLint)	23s
Tests: Print	46s
Tests: API	0s
Lint: API (php-cs-fixer)	0s
Tests: Frontend	3m 42s
Lint: Frontend (ESLint)	30s
Lint: e2e (ESLint)	20s
Tests: End-to-end build / Tests: End-to-end (build job)	27s
Tests: End-to-end run / Tests: End-to-end (chrome)	4m 11s
Tests: End-to-end run / Tests: End-to-end (firefox)	4m 48s
Tests: End-to-end run / Tests: End-to-end (edge)	4m 13s
Finish coveralls report	0s
workflow-success	2s
Send out CI success event	0s
	20m 20s

Provide feedback