Use intent model from archfc to pick prompt gateway (#328)

tests/e2e/README.md

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+# e2e tests
+
+e2e tests for arch llm gateway and prompt gateway
+
+To be able to run e2e tests successfully run_e2e_script prepares environment in following way,
+
+1. build and start weather_forecast demo (using docker compose)
+1. build, install and start model server async (using poetry)
+1. build and start arch gateway (using docker compose)
+1. wait for model server to be ready
+1. wait for arch gateway to be ready
+1. start e2e tests (using poetry)
+   1. runs llm gateway tests for llm routing
+   2. runs prompt gateway tests to test function calling, parameter gathering and summarization
+2. cleanup
+   1. stops arch gateway
+   2. stops model server
+   3. stops weather_forecast demo
+
+## How to run
+
+To run locally make sure that following requirements are met.
+
+### Requirements
+
+- Python 3.10
+- Poetry
+- Docker
+
+### Running tests locally
+
+```sh
+sh run_e2e_test.sh
+```