Add support for external LFS servers

Author: michaelmigliore

action.yml

@@ -72,7 +72,7 @@ runs:
       shell: bash
       run: echo "lfs_sha=${{env.lfs_data_cache_sha}}" >> $GITHUB_OUTPUT
 
-    - name: Checkout LFS data for artifact producer
+    - name: Checkout repository for artifact producer
       if: |
         steps.cache-lfs.outputs.cache-hit != 'true' &&
         inputs.type == 'producer'
@@ -84,6 +84,13 @@ runs:
         fetch-depth: 1
         lfs: true
 
+    - name: Pull LFS data for artifact producer
+      if: |
+        steps.cache-lfs.outputs.cache-hit != 'true' &&
+        inputs.type == 'producer'
+      working-directory: ${{github.workspace}}/lfs_data_cache/lfs_data
+      run: git lfs fetch --all && git lfs checkout
+
     - name: Upload LFS artifact
       if: inputs.type == 'producer'
       uses: actions/upload-artifact@v4