Check manifest template exists

Author: aybchan

Diff for: .github/workflows/_transformer_engine_eks.yaml

@@ -57,19 +57,22 @@ jobs:
       uses: ./.github/actions/store-delete-k8s-ghcr
     - name: Configure job manifest
       run: |
+        set -x
         K8S_JOB_TEMPLATE="${{ env.TE_EKS_FILES_PREFIX }}/test.yml"
         K8S_JOB_MANIFEST="${{ env.TE_EKS_FILES_PREFIX }}/${{ matrix.TEST }}.yml"
         SCRIPT="${{ env.TE_EKS_FILES_PREFIX }}/scripts/${{ matrix.TEST }}.sh"
 
+        if ! [ -f $K8S_JOB_TEMPLATE ]; then
+          echo "Template manifest does not exist at $K8S_JOB_TEMPLATE"
+          exit 1
+        fi
+
         # paste in script to manifest from file
+        # update placeholder values
         sed '/SCRIPT/ {
             r '$SCRIPT'
             d
         }' $K8S_JOB_TEMPLATE | \
-            tee $K8S_JOB_MANIFEST > /dev/null
-
-        # update placeholder values
-        cat $K8S_JOB_MANIFEST | \
             sed s@JOB_NAME@${{ env.RUN_NAME }}@g | \
             sed s@IMAGE_URI@${{ inputs.JAX_IMAGE }}@g | \
             sed s@SECRETS_NAME@${{ steps.store-token.outputs.token-name }}@g | \