Description of problem:

We noticed that podman-4.6.0-3.el9.x86_64 does not handle multi-line values passed to the --env option
and it only accepts the first line.

+ podman inspect container-puppet-memcached
[
     {
          "Id": "36166f7f5e31e581e3b17db5b02b80bfb11204a24d6923cce3c938aaa612ae07",
          ...
          "Config": {
               ...
               "Env": [
                    "NET_HOST=true",
                    "DEBUG=false",
                    "HOSTNAME=standalone",
                    "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                    "container=oci",
                    "PUPPET_TAGS=file,file_line,concat,augeas,cron,file",
                    "STEP=6",
                    "LANG=en_US.UTF-8",
                    "NAME=memcached",
                    "STEP_CONFIG=include ::tripleo::packages", <=====(*)
                    "HOME=/root"
               ],
               ...
     }
}

This problem was not seen when podman-4.6.0-1.el9.x86_64 is used.

+ podman inspect container-puppet-memcached
[
     {
          "Id": "36166f7f5e31e581e3b17db5b02b80bfb11204a24d6923cce3c938aaa612ae07",
          ...
          "Config": {
               ...
               "Env": [
                    "NET_HOST=true",
                    "NO_ARCHIVE=",
                    "TERM=xterm",
                    "container=oci",
                    "STEP=6",
                    "DEBUG=false",
                    "HOSTNAME=standalone",
                    "PUPPET_TAGS=file,file_line,concat,augeas,cron,file",
                    "NAME=memcached",
                    "STEP_CONFIG=include ::tripleo::packages\ninclude tripleo::profile::base::memcached\n", <=====(*)
                    "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                    "LANG=en_US.UTF-8",
                    "HOME=/root"
               ],
               ...
     }
]

Version-Release number of selected component (if applicable):
podman-4.6.0-3.el9.x86_64

How reproducible:
Always

Steps to Reproduce:
1. Create a container with an environment which has multi-line value
$ podman run -it --env foo="bar
baz" <image> /bin/bash

2. Echo the environment inside the container
# echo $foo

3. Check Config.Env of the container by inspect
$ podman inspect <container name>


Actual results:
The environment in container contains only the first line

```
[root@131d1dc33adc /]# echo $foo
bar
[root@131d1dc33adc /]#
```

```
$ podman inspect naughty_kowalevski | head -3
[
     {
          "Id": "131d1dc33adc781ad8f171b6d569321a8b35ed2e4831e5feb6109bcc8886e596",
          ...
               "Env": [
                    "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                    "container=podman",
                    "TERM=xterm",
                    "foo=bar",
                    "HOME=/root",
                    "HOSTNAME=131d1dc33adc"
               ],

```

Expected results:
The environment in container contains all the lines

```
[root@cecaed241326 /]# echo $foo
bar baz
[root@cecaed241326 /]#
```

```
$ podman inspect agitated_hamilton
[
     {
          "Id": "cecaed2413262f4e19e1e0dce64b1bfaa0db23032aece7a924293974aafe08b5",
          ...
               "Env": [
                    "container=podman",
                    "foo=bar\nbaz",
                    "PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
                    "TERM=xterm",
                    "HOME=/root",
                    "HOSTNAME=cecaed241326"
               ],
```

Additional info:
This issue was initially found in the TripleO project in OpenStack.