Bump main and release-1.7 branch k8s tests to upgrade k8s to v1.30.0 from v1.29.0

Also remove oldest k8s upgrade test for main branch i.e. v1.26.x to v1.27.x
Signed-off-by: Kashif Khan <kashif.khan@est.tech>
Change-Id: Idf4dd692ac3bade980674511b863c9e57db360bf
Signed-off-by: Kashif Khan <kashif.khan@est.tech>
diff --git a/jjb/metal3/job_openstack_image_building.yml b/jjb/metal3/job_openstack_image_building.yml
index 7cad3c2..18e02ae 100644
--- a/jjb/metal3/job_openstack_image_building.yml
+++ b/jjb/metal3/job_openstack_image_building.yml
@@ -1,4 +1,3 @@
----
 #
 # ============LICENSE_START=======================================================
 #  Copyright (C) 2019 Nordix Foundation.
@@ -37,15 +36,15 @@
     parameters:
     - string:
         name: KUBERNETES_VERSION
-        default: "v1.29.0"
+        default: "v1.30.0"
         description: 'Kubernetes version'
     - string:
         name: KUBECTL_SHA256
-        default: '0e03ab096163f61ab610b33f37f55709d3af8e16e4dcc1eb682882ef80f96fd5'  # v1.29.0
+        default: '7c3807c0f5c1b30110a2ff1e55da1d112a6d0096201f1beb81b269f582b5d1c5' # v1.30.0
         description: 'Kubectl SHA256 digest matching KUBERNETES_VERSION'
     - string:
         name: KIND_NODE_IMAGE_VERSION
-        default: "v1.29.0"
+        default: "v1.29.2"
         description: 'Kind node container image version'
 
     properties:
@@ -61,7 +60,7 @@
           url: "{ci_github_repo}"
           credentials-id: "{ci_github_jenkins_credentials_id}"
           branches:
-            - 'main'
+          - 'main'
           name: 'origin'
           refspec: '+refs/heads/*:refs/remotes/origin/*'
           wipe-workspace: True