feat: Add cloudformation describe stack step on create cluster failure (

#4556)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/actions/e2e/create-cluster/action.yaml

@@ -57,7 +57,7 @@ runs:
         --template-file $CLOUDFORMATION_PATH \
         --capabilities CAPABILITY_NAMED_IAM \
         --parameter-overrides "ClusterName=${{ inputs.cluster_name }}" \
-        --tags "testing.karpenter.sh/type=e2e" "github.com/run-url=https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+        --tags "testing.karpenter.sh/type=e2e" "github.com/run-url=https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}" "karpenter.sh/discovery=${{ inputs.cluster_name }}"
   - name: create or upgrade cluster
     shell: bash
     run: |
@@ -141,4 +141,13 @@ runs:
       --cluster "${{ inputs.cluster_name }}" \
       --arn "arn:aws:iam::${{ inputs.account_id }}:role/KarpenterNodeRole-${{ inputs.cluster_name }}" \
       --group system:bootstrappers \
-      --group system:nodes
+      --group system:nodes
+  - name: cloudformation describe stack events
+    shell: bash
+    if: failure()
+    run: |
+      stack_names=$(aws cloudformation describe-stacks --query 'Stacks[?Tags[?Key == `karpenter.sh/discovery` && Value == `${{ inputs.CLUSTER_NAME }}`]].{StackName: StackName}' --output text)
+      for stack_name in $stack_names; do
+        echo "Stack Events for $stack_name:"
+        aws cloudformation describe-stack-events --stack-name $stack_name
+      done