Bug 1798587 - Make condprof `linux64-firefox` command use `venv` instead of `virtualenv` (just like the `macosx64-firefox` command) r=firefox-build-system-reviewers,glandium

Differential Revision: https://phabricator.services.mozilla.com/D160979

taskcluster/ci/condprof/kind.yml

@@ -87,7 +87,7 @@ jobs:
                 - linux64-geckodriver
         run:
             command: >-
-                python3.7 virtualenv/virtualenv.py . &&
+                python3.7 -m venv . &&
                 bin/python3.7 condprof/main.py
                 ${EXTRA_ARGS}
                 --geckodriver ${MOZ_FETCHES_DIR}/geckodriver

taskcluster/docker/condprof/Dockerfile

@@ -7,7 +7,9 @@ VOLUME /builds/worker/tooltool-cache
 VOLUME /builds/worker/workspace
 
 RUN apt-get -y update && \
-    apt-get install -y python3.7
+    apt-get install -y python3.7 \
+      python3.7-venv \
+      python3.7-dev
 
 CMD ["/bin/bash", "--login"]