Error: creating /etc/mtab symlink: invalid argument

### Issue Description

podman failed to initialize rootless storage.

### Steps to reproduce the issue

Steps to reproduce the issue:

1. create storage.conf

```
[storage]
driver = "overlay"
runroot = "$PWD/podman"
graphroot = "$PWD/podman"
rootless_storage_path = "$PWD/podman"

[storage.options.overlay]
mount_program = "/usr/bin/fuse-overlayfs"
```

2. export CONTAINERS_STORAGE_CONF="$PWD/storage.conf"
3. podman run --rm registry.gitlab.steamos.cloud/proton/sniper/sdk:0.20240307.80401-0

### Describe the results you received

`Error: creating /etc/mtab symlink: invalid argument`

### Describe the results you expected

storage successfully initialized

### podman info output

```yaml
host:
arch: amd64
buildahVersion: 1.37.5
cgroupControllers:
- cpu
- memory
- pids
cgroupManager: systemd
cgroupVersion: v2
conmon:
package: conmon_2.1.12-3_amd64
path: /usr/bin/conmon
version: 'conmon version 2.1.12, commit: unknown'
cpuUtilization:
idlePercent: 88.54
systemPercent: 3.79
userPercent: 7.67
cpus: 8
databaseBackend: sqlite
distribution:
codename: trixie
distribution: debian
version: unknown
eventLogger: journald
freeLocks: 2048
hostname: axet-desktop
idMappings:
gidmap:
- container_id: 0
host_id: 1000
size: 1
- container_id: 1
host_id: 100000
size: 65536
uidmap:
- container_id: 0
host_id: 1000
size: 1
- container_id: 1
host_id: 100000
size: 65536
kernel: 6.11.7-amd64
linkmode: dynamic
logDriver: journald
memFree: 3419398144
memTotal: 33478434816
networkBackend: netavark
networkBackendInfo:
backend: netavark
dns:
package: aardvark-dns_1.12.2-1_amd64
path: /usr/lib/podman/aardvark-dns
version: aardvark-dns 1.12.2
package: netavark_1.12.1-3_amd64
path: /usr/lib/podman/netavark
version: netavark 1.12.1
ociRuntime:
name: crun
package: crun_1.18.2-1_amd64
path: /usr/bin/crun
version: |-
crun version 1.18.2
commit: 00ab38af875ddd0d1a8226addda52e1de18339b5
rundir: /run/user/1000/crun
spec: 1.0.0
+SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +WASM:wasmedge +YAJL
os: linux
pasta:
executable: /usr/bin/pasta
package: passt_0.0~git20241030.ee7d0b6-1_amd64
version: |
pasta 0.0~git20241030.ee7d0b6-1
Copyright Red Hat
GNU General Public License, version 2 or later

This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
remoteSocket:
exists: true
path: /run/user/1000/podman/podman.sock
rootlessNetworkCmd: pasta
security:
apparmorEnabled: false
capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
rootless: true
seccompEnabled: true
seccompProfilePath: /usr/share/containers/seccomp.json
selinuxEnabled: false
serviceIsRemote: false
slirp4netns:
executable: /usr/bin/slirp4netns
package: slirp4netns_1.2.1-1+b1_amd64
version: |-
slirp4netns version 1.2.1
commit: 09e31e92fa3d2a1d3ca261adaeb012c8d75a8194
libslirp: 4.8.0
SLIRP_CONFIG_VERSION_MAX: 4
libseccomp: 2.5.5
swapFree: 19871469568
swapTotal: 25769795584
uptime: 20h 20m 33.00s (Approximately 0.83 days)
variant: ""
plugins:
authorization: null
log:
- k8s-file
- none
- passthrough
- journald
network:
- bridge
- macvlan
- ipvlan
volume:
- local
registries: {}
store:
configFile: /media/axet/2TB/Games/proton903/podman/storage.conf
containerStore:
number: 0
paused: 0
running: 0
stopped: 0
graphDriverName: overlay
graphOptions:
overlay.mount_program:
Executable: /usr/bin/fuse-overlayfs
Package: fuse-overlayfs_1.13-1_amd64
Version: |-
fusermount3 version: 3.14.0
fuse-overlayfs: version 1.13-dev
FUSE library version 3.14.0
using FUSE kernel interface version 7.31
graphRoot: /media/axet/2TB/Games/proton903/podman
graphRootAllocated: 2000381018112
graphRootUsed: 1292271300608
graphStatus:
Backing Filesystem: btrfs
Native Overlay Diff: "false"
Supports d_type: "true"
Supports shifting: "true"
Supports volatile: "true"
Using metacopy: "false"
imageCopyTmpDir: /var/tmp
imageStore:
number: 1
runRoot: /run/user/1000/containers
transientStore: false
volumePath: /media/axet/2TB/Games/proton903/podman/volumes
version:
APIVersion: 5.2.5
Built: 1729890366
BuiltTime: Sat Oct 26 00:06:06 2024
GitCommit: ""
GoVersion: go1.23.2
Os: linux
OsArch: linux/amd64
Version: 5.2.5
```

### Podman in a container

No

### Privileged Or Rootless

Rootless

### Upstream Latest Release

No

### Additional environment details

Debian Trixie

### Additional information

Happens everytime.