Increase lease timeout for CheckIngressIpAddressService to reduce polling frequency (#42643)

app/services/clusters/applications/check_ingress_ip_address_service.rb

@@ -5,7 +5,7 @@ module Clusters
 
       Error = Class.new(StandardError)
 
-      LEASE_TIMEOUT = 3.seconds.to_i
+      LEASE_TIMEOUT = 15.seconds.to_i
 
       def execute
         return if app.external_ip

spec/services/clusters/applications/check_ingress_ip_address_service_spec.rb

@@ -25,7 +25,7 @@ describe Clusters::Applications::CheckIngressIpAddressService do
     allow(application.cluster).to receive(:kubeclient).and_return(kubeclient)
     allow(Gitlab::ExclusiveLease)
       .to receive(:new)
-      .with("check_ingress_ip_address_service:#{application.id}", timeout: 3.seconds.to_i)
+      .with("check_ingress_ip_address_service:#{application.id}", timeout: 15.seconds.to_i)
       .and_return(exclusive_lease)
   end