Rework CI Pipeline (#839)

Change pypy to pypy27 in tox.

Fix checkout logic

Pin tox requires

.github/containers/Dockerfile

@@ -59,11 +59,8 @@ RUN sed -i 's/Driver=psqlodbca.so/Driver=\/usr\/lib\/x86_64-linux-gnu\/odbc\/psq
 RUN locale-gen --no-purge en_US.UTF-8
 ENV LANG=en_US.UTF-8 \ LANGUAGE=en_US:en \ LC_ALL=en_US.UTF-8
 
-# Set user to non-root
-ENV HOME /home/github
-RUN groupadd -g 1000 github && \
-    useradd -m -d "${HOME}" -s /bin/bash -u 1000 -g 1000 github
-USER 1000:1000
+# Use root user
+ENV HOME /root
 WORKDIR "${HOME}"
 
 # Install pyenv

tox.ini

@@ -40,6 +40,7 @@
 ;   - python-adapter_gevent-py27
 
 [tox]
+requires = virtualenv<20.22.0
 setupdir = {toxinidir}
 envlist =
     python-adapter_cheroot-{py37,py38,py39,py310,py311},