[Error] Avoid adding unmounted autofs root paths to the container

**Describe the bug**

When the host root filesystem contains unmounted mountpoints to autofs mounts, the container creation step hangs for a long time, sometimes fails, and distrobox enter fails.
Recreating the container sometimes works (possibly because the filesystems where mounted by autofs)

**To Reproduce**
- Create directory under hosts '/' and add an autofs mountpoint for it.
- distrobox create
- distrobox enter

**Expected behavior**
Distrobox runs correctly

**Desktop (please complete the following information):**
- Podman version 4.9.4-rhel
- Host: Red Hat Enterprise Linux release 8.10 (Ootpa)
- Image: arch-toolbox
- Distrobox: 1.8.1.2
- Distrobox installed via install script into custom location

**Additional context**

Ignoring autofs mountpoints seems to fix the issue. I implemented this locally as a POC like this, in distrobox-create/generate_create_command():
```
for rootdir in /*; do

# Skip symlinks
if [ -L "${rootdir}" ]; then
continue
fi

target_opts=$(findmnt --notruncate --noheadings --list -t noautofs --output OPTIONS --target "${rootdir}" || true)

# Skip unmounted autofs targets
if [ -z "$target_opts" ]; then
continue
fi

# Find if the directory belongs to a RO mount, if do, mount it as RO+Rslave
if echo "$target_opts" | tr ',' '\n' | grep -q "^ro$"; then

result_command="${result_command}
--volume ${rootdir}:/run/host${rootdir}:ro,rslave"
continue
fi

# Else we mount it RW+Rslave
result_command="${result_command}
--volume ${rootdir}:/run/host${rootdir}:rslave"
done
```
Note the `-t noautofs` in `findmnt` command, this filters the results by filesystem type. Perhaps it would be wise to ignore other "problematic" filesystems like network filesystems (nfs, smb, etc) too.