Update docs references for ansible-test. (#60109)

* Remove outdated info from azure-requirements docs.
* Correct validate-modules usage.

docs/docsite/rst/dev_guide/testing/sanity/azure-requirements.rst

@@ -6,5 +6,3 @@ Update the Azure integration test requirements file when changes are made to the
 .. code-block:: bash
 
     cp packaging/requirements/requirements-azure.txt test/runner/requirements/integration.cloud.azure.txt
-
-This copy of the requirements file is used when building the ``ansible/ansible:default`` Docker container from ``test/runner/Dockerfile``.

docs/docsite/rst/dev_guide/testing_documentation.rst

@@ -33,4 +33,4 @@ To ensure that your module documentation matches your ``argument_spec``:
 
 #. run the ``validate-modules`` test::
 
-   ./test/sanity/validate-modules/validate-modules --arg-spec --warnings lib/ansible/modules/$CATEGORY/mymodule.py
+    ansible-test sanity --test validate-modules mymodule