Test backend opentelemetry changes

Author: robtaylor

.github/workflows/main.yaml

@@ -45,5 +45,8 @@ jobs:
 
   test-submit:
     uses: ./.github/workflows/test-examples.yml
+    with:
+      CHIPFLOW_BACKEND_VERSION: 'branch-opentracing-batch'
     secrets:
       CHIPFLOW_API_KEY: ${{ secrets.CHIPFLOW_API_KEY}}
+

.github/workflows/test-examples.yml

@@ -2,6 +2,10 @@ name: Reusable workflow to test everything in chipflow-examples works
 
 on:
   workflow_call:
+    inputs:
+      CHIPFLOW_BACKEND_VERSION:
+        required: false
+        default: ''
     secrets:
       CHIPFLOW_API_KEY:
         required: true