Test against OCP 4.20.1 (#8911)

Test ECK against OCP 4.20.4 in order to be able to declare that we are compatible.

Author: pebrc

.buildkite/e2e/release-branch-matrix.yaml

@@ -65,7 +65,7 @@
   fixed:
     E2E_PROVIDER: ocp
   mixed:
-    - DEPLOYER_CLIENT_VERSION: "4.19.2"
+    - DEPLOYER_CLIENT_VERSION: "4.20.4"
 
 - label: eks-arm
   fixed:

README.md

@@ -18,7 +18,7 @@ Current features:
 Supported versions:
 
 *  Kubernetes 1.30-1.34
-*  OpenShift 4.15-4.19
+*  OpenShift 4.15-4.20
 *  Elasticsearch, Kibana, APM Server: 7.17+, 8+, 9+
 *  Enterprise Search: 7.7+, 8+
 *  Beats: 7.17+, 8+, 9+

hack/deployer/config/plans.yml

@@ -93,7 +93,7 @@ plans:
 - id: ocp-ci
   operation: create
   clusterName: ci
-  clientVersion: 4.19.14
+  clientVersion: 4.20.4
   provider: ocp
   machineType: n1-standard-8
   serviceAccount: true
@@ -103,7 +103,7 @@ plans:
 - id: ocp-dev
   operation: create
   clusterName: dev
-  clientVersion: 4.19.14
+  clientVersion: 4.20.4
   provider: ocp
   machineType: n1-standard-8
   serviceAccount: true

hack/operatorhub/templates/csv.tpl

@@ -286,7 +286,7 @@ spec:
 
     * Kubernetes 1.30-1.34
 
-    * OpenShift 4.15-4.19
+    * OpenShift 4.15-4.20
 
     * Google Kubernetes Engine (GKE), Azure Kubernetes Service (AKS), and Amazon Elastic Kubernetes Service (EKS)