wip: try podman as runtime in CI

Author: euanh

Docker/Dockerfile

@@ -7,7 +7,7 @@ ARG swift_version
 ARG ubuntu_version
 
 # set as UTF-8
-RUN apt-get update && apt-get install -y locales locales-all libsqlite3-dev
+RUN apt-get update && apt-get install -y locales locales-all libsqlite3-dev podman
 ENV LC_ALL en_US.UTF-8
 ENV LANG en_US.UTF-8
 ENV LANGUAGE en_US.UTF-8

Docker/docker-compose.yaml

@@ -27,6 +27,7 @@ services:
     <<: *common
     environment:
       - JENKINS_URL
+      - SWIFT_SDK_GENERATOR_CONTAINER_RUNTIME=podman
     command: /bin/bash -xcl "swift test $${WARN_AS_ERROR_ARG-} $${SANITIZER_ARG-} $${IMPORT_CHECK_ARG-}"
 
   # util