scripts: remove read_replicas from generated dev config #25914

Job	Run time
lint-golint	1m 10s
test-unittest	3m 20s
ci-outpost-mark	1s
build-container (proxy)	3m 14s
build-binary (proxy, linux, amd64)	1m 52s
build-container (ldap)	2m 48s
build-binary (proxy, linux, arm64)	2m 13s
build-container (radius)	2m 48s
build-binary (ldap, linux, amd64)	1m 50s
build-container (rac)	2m 54s
build-binary (ldap, linux, arm64)	2m 10s
build-binary (radius, linux, amd64)	1m 56s
build-binary (radius, linux, arm64)	1m 55s
build-binary (rac, linux, amd64)	1m 58s
build-binary (rac, linux, arm64)	1m 55s
	32m 4s

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