removing model_server python module to brightstaff (function calling) (#615)

* adding function_calling functionality via rust

* fixed rendered YAML file

* removed model_server from envoy.template and forwarding traffic to bright_staff

* fixed bugs in function_calling.rs that were breaking tests. All good now

* updating e2e test to clean up disk usage

* removing Arch* models to be used as a default model if one is not specified

* if the user sets arch-function base_url we should honor it

* fixing demos as we needed to pin to a particular version of huggingface_hub else the chatbot ui wouldn't build

* adding a constant for Arch-Function model name

* fixing some edge cases with calls made to Arch-Function

* fixed JSON parsing issues in function_calling.rs

* fixed bug where the raw response from Arch-Function was re-encoded

* removed debug from supervisord.conf

* commenting out disk cleanup

* adding back disk space

---------

Co-authored-by: Salman Paracha <salmanparacha@MacBook-Pro-288.local>
Co-authored-by: Salman Paracha <salmanparacha@MacBook-Pro-342.local>

.github/workflows/e2e_tests.yml

@@ -14,6 +14,32 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v3
 
+      # --- Disk inspection & cleanup section (added to free space on GitHub runner) ---
+      - name: Check disk usage before cleanup
+        run: |
+          echo "=== Disk usage before cleanup ==="
+          df -h
+          echo "=== Repo size ==="
+          du -sh .
+
+      - name: Free disk space on runner
+        run: |
+          echo "=== Cleaning preinstalled SDKs and toolchains to free space ==="
+          sudo rm -rf /usr/share/dotnet
+          sudo rm -rf /usr/local/lib/android
+          sudo rm -rf /opt/ghc
+          # If you still hit disk issues, uncomment this to free more space.
+          # It just removes cached tool versions; setup-python will re-download what it needs.
+          # sudo rm -rf /opt/hostedtoolcache || true
+
+          echo "=== Docker cleanup (before our builds/compose) ==="
+          docker system prune -af || true
+          docker volume prune -f || true
+
+          echo "=== Disk usage after cleanup ==="
+          df -h
+      # --- End disk cleanup section ---
+
       - name: Set up Python
         uses: actions/setup-python@v4
         with: