chore(gha): setup-python accepts requirements to install (#6463)

.github/workflows/pr-python-tests.yml

@@ -37,6 +37,12 @@ jobs:
 
     - name: Setup Python and Install Dependencies
       uses: ./.github/actions/setup-python-and-install-dependencies
+      with:
+        requirements: |
+          backend/requirements/default.txt
+          backend/requirements/dev.txt
+          backend/requirements/model_server.txt
+          backend/requirements/ee.txt
 
     - name: Run Tests
       shell: script -q -e -c "bash --noprofile --norc -eo pipefail {0}"