Make the podman run `--tz` option operable for java applications

As a user of java within a container, I want to be able to set the timezone in the container using the `podman run --tz` option.  This currently does not work for java applications.  Instead, the user must set the `TZ` in the container.  The `–tz`  option should work in the same manner, or at least set that environment variable to.  For instance, this command works:

`podman run -ti --rm -e TZ=EST mytzimage`

For more information, see https://bugzilla.redhat.com/show_bug.cgi?id=1984251 and https://github.com/containers/podman/pull/12373

This should be completed for RHEL 8.6/Podman 4.0.