reverse runid-attempt for cluster id

.github/workflows/pr-loadtest.yml

@@ -61,7 +61,11 @@ jobs:
         uses: "./.github/template/setup-golang"
 
       - name: Setup gardener cluster name
-        run: echo "GARDENER_CLUSTER_NAME=$(echo ${{ matrix.name }}-${{ github.run_id }}${{ github.run_attempt }} | tr -cd '[:alnum:]' | cut -c 1-14)" >> $GITHUB_ENV
+        run: |
+          ID=$(echo ${{ github.run_id }}${{ github.run_attempt }} | rev )
+          SHORT_NAME=$(echo ${{ matrix.name }} | awk -F- '{for(i=1;i<=NF;i++) printf "%s",substr($i,1,1);print "";}')
+          GARDENER_CLUSTER_NAME=$(echo lt-${SHORT_NAME}-${ID} | cut -c 1-14)
+          echo "GARDENER_CLUSTER_NAME=$GARDENER_CLUSTER_NAME" >> $GITHUB_ENV
 
       # save gardener kubeconfig to a temp file in order to pass it to the command
       - name: Save service account to file