podman-remote: run --entrypoint: extra /bin/sh somewhere

[edsantiago]

In window 1:

$ ./bin/podman system service --timeout=0

Window 2:

$ ./bin/podman-remote run --entrypoint='["/bin/echo"]' alpine
/bin/sh     <---- expected: empty line

This is a problem because it's getting passed to all entrypoint commands:

$ ./bin/podman-remote run --entrypoint='["/bin/date"]' alpine
date: invalid date '/bin/sh'

master @ 288ebec, root & rootless

[mheon]

The Alpine image does not specify ENTRYPOINT - instead it specified a CMD (/bin/sh). We were appending the image's CMD to the manually-specified ENTRYPOINT, but it looks like this is incorrect - we should only add image CMD if the user did not specify an entrypoint.