Add jobs for k8s external DNS

+ switch other jobs to a generic template

Related story: https://mirantis.jira.com/browse/PROD-22456

Change-Id: I355b91071af7320de10d0ead1acdc43c0761169a
diff --git a/jenkins/client/job/k8s-test/init.yml b/jenkins/client/job/k8s-test/init.yml
index 59904c2..7a391af 100644
--- a/jenkins/client/job/k8s-test/init.yml
+++ b/jenkins/client/job/k8s-test/init.yml
@@ -1,12 +1,6 @@
 classes:
 - system.jenkins.client.job.k8s-test.mcp-k8s-test-pipeline
 - system.jenkins.client.job.k8s-test.mcp-k8s-merge-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-dashboard-test-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-dashboard-merge-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-nginx-ingress-test-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-nginx-ingress-merge-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-metallb-test-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-metallb-merge-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-coredns-test-pipeline
-- system.jenkins.client.job.k8s-test.mcp-k8s-coredns-merge-pipeline
+- system.jenkins.client.job.k8s-test.mcp-k8s-generic-test-pipeline
+- system.jenkins.client.job.k8s-test.mcp-k8s-generic-merge-pipeline
 - system.jenkins.client.job.k8s-test.mcp-k8s-formula-test-pipeline