Container samples not working using podman

Refs #2854

repro

1. Using podman 1.9
2. Run Containers: Try a sample and select Python

Bug
The container fails to start.

Logs:

[0 ms] Start: Resolving remote
[2 ms] Start: Check Docker is running
[2 ms] Start: Run: docker info
[366 ms] Start: Run: docker volume create --label vsch.local.repository=https://github.com/Microsoft/vscode-remote-try-python --label vsch.local.repository.unique=false vsc-remote-sample
[473 ms] Start: Run: docker ps -q -a --filter label=vsch.local.repository=https://github.com/Microsoft/vscode-remote-try-python --filter label=vsch.local.repository.volume=vsc-remote-sample --filter label=vsch.local.repository.folder=vscode-remote-try-python --filter label=vsch.quality=insider
[590 ms] Start: Run: docker build -f /home/parallels/.vscode-insiders/extensions/ms-vscode-remote.remote-containers-0.113.0/scripts/volumeBootstrap.Dockerfile -t vsc-volume-bootstrap /home/parallels/.vscode-insiders/extensions/ms-vscode-remote.remote-containers-0.113.0/scripts
STEP 1: FROM alpine:3.11.2
STEP 2: RUN apk add --no-cache  nodejs  git     openssh-client  docker-cli      ;
--> Using cache 0faec7dc36e550fd8340d295a87eac456ae140b80a203267ccd6b6f0e0a2c286
STEP 3: COMMIT vsc-volume-bootstrap
--> 0faec7dc36e
0faec7dc36e550fd8340d295a87eac456ae140b80a203267ccd6b6f0e0a2c286
[731 ms] Cloning Github repository: Microsoft/vscode-remote-try-python into /workspaces/vscode-remote-try-python

[731 ms] Start: Run: docker run -d --mount src=vsc-remote-sample,dst=/workspaces,type=volume,volume-driver=local -v /var/run/docker.sock:/var/run/docker.sock vsc-volume-bootstrap sleep infinity```

And the specific error:

$ docker run -d --mount src=vsc-remote-sample,dst=/workspaces,type=volume,volume-driver=local -v /var/run/docker.sock:/var/run/docker.sock vsc-volume-bootstrap sleep infinity
Error: "src=vsc-remote-sample,dst=/workspaces,type=volume,volume-driver=local": incorrect mount format: should be --mount type=<bind|tmpfs|volume>,[src=<host-dir|volume-name>,]target=<ctr-dir>[,options]