github: Remove redundant backend workflow

We already build and test the backend in backend-test workflow.
(and also in the app ones, and container test)

Signed-off-by: René Dudfield <renedudfield@microsoft.com>

.github/workflows/backend-test.yml

@@ -4,6 +4,7 @@ on:
   pull_request:
     paths:
       - 'backend/**'
+      - '.github/workflows/backend-test.yml'
   push:
     branches:
       - main
@@ -44,6 +45,19 @@ jobs:
           minikube addons enable headlamp
           kubectl wait deployment -n headlamp headlamp --for condition=Available=True --timeout=30s    
 
+      - name: setup and run golangci-lint 
+        uses: golangci/golangci-lint-action@d6238b002a20823d52840fda27e2d4891c5952dc # v4.0.1
+        with:
+          version: v1.54
+          working-directory: backend
+          skip-cache: true
+          args: --timeout 3m
+
+      - name: Lint, Build & Check
+        run: |
+          cd $GITHUB_WORKSPACE
+          make backend
+
       - name: Run tests and calculate code coverage
         run: |
           cd backend