[DO NOT REVIEW] Migrate to eslint 9 and flat config #12653

Job	Run time
yarn_lock_check	2m 15s
build	17m 56s
version	18s
checks / lint	16m 33s
checks / markdown-link-check	56s
checks / test (ubuntu-latest)	9m 44s
checks / test (windows-latest)	12m 27s
documentation-pr / build	3m 37s
documentation-pr / deploy-on-azure-static-webapp	0s
documentation-main	0s
e2e-tests / e2e-tests	4m 59s
it-tests / prepare-verdaccio	2m 59s
it-tests / it-tests (ubuntu-latest, yarn, o3r-project-with-app)	31m 4s
it-tests / it-tests (ubuntu-latest, npm, o3r-project-with-app)	33m 47s
it-tests / it-tests (windows-latest, yarn, o3r-project-with-app)	47m 5s
it-tests / it-tests (windows-latest, npm, o3r-project-with-app)	1h 1m 34s
publish-packages	0s
	4h 5m 14s

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