Let testnet and devnet be reached

Both gateways declared a host and no tls, so cert-manager was never asked for a
certificate and the ingress answered with its own default self-signed one.
Every client fails the handshake before a route is ever consulted: curl reports
"unable to get local issuer certificate" and the connection ends there, which
reads as the API being down rather than untrusted.

api.lux.network already carries this block; testnet and devnet are the two that
were missing it, on the same ingress, which is why explore.lux.network answers
on that address and these two do not.

Co-authored-by: Hanzo Dev <[email protected]>

migrations/lux-network-to-lux-cloud/manifests/gateway-lux-devnet.yaml

@@ -92,3 +92,7 @@ spec:
     burst: 200
     requestsPerSecond: 100
   replicas: 1
+  tls:
+    certManager: true
+    issuer: letsencrypt-prod
+    secretName: api-devnet-lux-network-tls

migrations/lux-network-to-lux-cloud/manifests/gateway-lux-testnet.yaml

@@ -92,3 +92,7 @@ spec:
     burst: 200
     requestsPerSecond: 100
   replicas: 1
+  tls:
+    certManager: true
+    issuer: letsencrypt-prod
+    secretName: api-testnet-lux-network-tls