feat(rust/rbac-registration): refactor cip509 extract key fns #1883

Job	Run time
ci / discover	15s
ci / check / .+check-markdown	46s
ci / check / .+check-python	47s
ci / check / .+check-spelling	48s
ci / check / ./docs/src/architecture/08_concepts/catalyst_voting/cddl+check-cddl	46s
ci / check / ./docs/src/architecture/08_concepts/immutable_ledger/cddl+check-cddl	38s
ci / check / ./rust+check	59s
ci / check / ./rust+check-builder-src-cache	40s
ci / check / ./specs+check	36s
ci / check / ./specs+check-docs-generation	39s
ci / build / ./rust+build	6m 3s
ci / package	0s
ci / nightly	0s
ci / test	0s
ci / release	0s
ci / docs / ./docs+docs	56s
ci / deploy	0s
ci / final	3s
test_reporting / Generate test reports	1m 8s
test_reporting / Generate allure report	45s
test_reporting / Generate coverage report	7s
	15m 56s

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