scripts: remove read_replicas from generated dev config #25806

Job	Run time
test-migrations	3m 12s
lint (bandit)	1m 48s
test-migrations-from-stable - PostgreSQL 15-alpine	18m 26s
lint (black)	1m 46s
test-migrations-from-stable - PostgreSQL 16-alpine	18m 30s
lint (codespell)	1m 58s
lint (pending-migrations)	2m 52s
lint (ruff)	1m 44s
test-e2e (proxy)	10m 2s
test-e2e (oauth)	10m 4s
test-e2e (oauth-oidc)	5m 58s
test-e2e (saml)	6m 20s
test-e2e (ldap)	10m 12s
test-e2e (radius)	4m 55s
test-e2e (scim)	3m 59s
test-e2e (flows)	5m 30s
test-integration	5m 7s
test-unittest - PostgreSQL 15-alpine	18m 10s
test-unittest - PostgreSQL 16-alpine	17m 35s
ci-core-mark	1s
build (amd64)	6m 24s
build (arm64)	27m 17s
pr-comment	6s
	3h 1m 56s

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