[developer productivity improvement] Running awx components in vscode debugger (#14942)

Enable VSCode debugger integration when attaching VSCode to with AWX docker-compose development environment container

- add debugpy launch target in `.vscode/launch.json` to enable launching awx processes with debugpy
- add vscode tasks in `.vscode/tasks.json` to facilitate shutting down corresponding supervisord managed processes while launching process with debugpy
- modify nginx conf to add django runserver as fallback to uwsgi (enable launching API server via debugpy)

requirements/requirements_dev.txt

@@ -20,10 +20,13 @@ jupyter
 # matplotlib - Caused issues when bumping to setuptools 58
 backports.tempfile  # support in unit tests for py32+ tempfile.TemporaryDirectory
 git+https://github.com/artefactual-labs/mockldap.git@master#egg=mockldap
-sdb
-remote-pdb
 gprof2dot
 atomicwrites==1.4.0
 flake8
 yamllint
 pip>=21.3 # PEP 660 – Editable installs for pyproject.toml based builds (wheel based)
+
+# python debuggers
+debugpy
+remote-pdb
+sdb