[GHA] Pin kustomize version we use in our test to the particular version

Recently the kustomize test started to fail for us since the kustomize
version 5.4 introduced some breaking changes for which we will need to
update our manifests to be compatible. This work will be tracked in [1].
In the meantime, we should pin kustomize version in our GHA to the
version that is used by the opendatahub-operator in runtime [2].

[1] https://issues.redhat.com/browse/RHOAIENG-11679
[2] https://github.com/red-hat-data-services/rhods-operator/blob/rhoai-2.12/go.mod#L30-L31

.github/workflows/code-quality.yaml

@@ -116,16 +116,23 @@ jobs:
           echo "Hadolint done"
 
       # This simply checks that the manifests and respective kustomization.yaml finishes without an error.
+      # Version of the kustomize that operator use in runtime to apply these changes is determined by:
+      # https://github.com/red-hat-data-services/rhods-operator/blob/7ccc405135f99c014982d7e297b8949e970dd750/go.mod#L28-L29
+      # and then to match appropriate kustomize release https://github.com/kubernetes-sigs/kustomize/releases/tag/kustomize%2Fv5.0.2
       - name: Check kustomize manifest
         id: kustomize-manifests
         run: |
-          kubectl version --client=true
+          KUSTOMIZE_VERSION=5.0.2
+          wget "https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize/v${KUSTOMIZE_VERSION}/kustomize_v${KUSTOMIZE_VERSION}_linux_amd64.tar.gz"
+          tar -xvf kustomize*
+
+          ./kustomize version
           echo "----------------------------------------------------------"
-          echo "Starting 'kubectl kustomize manifests/base'"
+          echo "Starting './kustomize build manifests/base'"
           echo "----------------------------------------------------------"
-          kubectl kustomize manifests/base
+          ./kustomize build manifests/base
 
           echo "----------------------------------------------------------"
-          echo "Starting 'kubectl kustomize manifests/overlays/additional'"
+          echo "Starting './kustomize build manifests/overlays/additional'"
           echo "----------------------------------------------------------"
-          kubectl kustomize manifests/overlays/additional
+          ./kustomize build manifests/overlays/additional