chore(deps): update typescript-eslint monorepo to ^6.21.0 #5978

Job	Run time
checkout	50s
backend	4m 21s
graphql	2m 2s
frontend	27s
auth	1m 6s
mock-account-servicing-entity	27s
token-introspection	29s
build	39s
all_pr_checks_passed	1s
	10m 22s

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