web: set noopener and noreferrer on all external links #21782

Job	Run time
test-migrations	3m 49s
test-unittest - PostgreSQL 15-alpine	14m 56s
test-unittest - PostgreSQL 16-alpine	14m 19s
lint (bandit)	2m 15s
lint (black)	2m 2s
test-e2e (proxy)	6m 21s
lint (codespell)	1m 53s
test-e2e (oauth)	8m 55s
lint (pending-migrations)	1m 52s
test-e2e (oauth-oidc)	7m 21s
lint (ruff)	1m 47s
test-e2e (saml)	7m 19s
test-e2e (ldap)	10m 34s
test-e2e (radius)	6m 3s
test-integration	5m 23s
test-e2e (scim)	5m 32s
test-e2e (flows)	6m 52s
test-migrations-from-stable - PostgreSQL 15-alpine	15m 45s
test-migrations-from-stable - PostgreSQL 16-alpine	15m 20s
ci-core-mark	1s
build (amd64)	7m 13s
build (arm64)	17m 25s
pr-comment	5s
	2h 43m 2s

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