infra: api docs build order (#15018)

.readthedocs.yaml

@@ -13,8 +13,8 @@ build:
       - python -mvirtualenv $READTHEDOCS_VIRTUALENV_PATH
       - python -m pip install --upgrade --no-cache-dir pip setuptools
       - python -m pip install --upgrade --no-cache-dir sphinx readthedocs-sphinx-ext
-      - python -m pip install --exists-action=w --no-cache-dir -r docs/api_reference/requirements.txt
       - python -m pip install ./libs/partners/*
+      - python -m pip install --exists-action=w --no-cache-dir -r docs/api_reference/requirements.txt
       - python docs/api_reference/create_api_rst.py
       - cat docs/api_reference/conf.py
       - python -m sphinx -T -E -b html -d _build/doctrees -c docs/api_reference docs/api_reference $READTHEDOCS_OUTPUT/html -j auto