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>

docs/source/resources/includes/arch_config_full_reference_rendered.yaml

@@ -61,6 +61,9 @@ model_providers:
   port: 80
   protocol: http
   provider_interface: mistral
+- model: Arch-Function
+  name: arch-function
+  provider_interface: arch
 overrides:
   prompt_target_intent_matching_threshold: 0.6
 prompt_guards: