Transition from virtualenv to venv (#1094)

src/debian/12/helix/amd64/Dockerfile

@@ -25,6 +25,7 @@ RUN apt-get update && \
         locales-all \
         python3-dev \
         python3-pip \
+        python3-venv \
         software-properties-common \
         sudo \
         tzdata \
@@ -35,9 +36,8 @@ RUN apt-get update && \
 ENV LANG=en_US.utf8
 
 RUN ln -sf /usr/bin/python3 /usr/bin/python && \
-    python3 -m pip install virtualenv==20.17.1 --break-system-packages && \
-    python3 -m pip download --no-deps helix-scripts --index-url https://dnceng.pkgs.visualstudio.com/public/_packaging/helix-client-prod/pypi/simple && \
-    python3 -m pip install ./helix_scripts-*-py3-none-any.whl --break-system-packages
+    pip download --no-deps helix-scripts --index-url https://dnceng.pkgs.visualstudio.com/public/_packaging/helix-client-prod/pypi/simple && \
+    pip install ./helix_scripts-*-py3-none-any.whl --break-system-packages
 
 # Add MsQuic
 RUN curl -LO https://packages.microsoft.com/keys/microsoft.asc && \
@@ -57,4 +57,4 @@ RUN /usr/sbin/adduser --disabled-password --gecos '' --uid 1000 --shell /bin/bas
 
 USER helixbot
 
-RUN python -m virtualenv /home/helixbot/.vsts-env
+RUN python3 -m venv /home/helixbot/.vsts-env