[Error] PATH order shadows user bin directories

[mpreu]

Describe the bug
When entering, some standard paths are prepended to $PATH unconditionally. This results in duplicated entries and shadows e.g. ~/bin and ~/.local/bin. Binaries placed in this directories are now shadowed by whatever the container image contains instead.

This behavior seems to be a result of #918.

To Reproduce
Enter any box and check $PATH.

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/sbin:/bin:/home/<user>/.local/bin:/home/<user>/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin

See, that paths are duplicated and now local user bin directories are shadowed in contrast to the host default PATH configuration.

Expected behavior
Just the default of the system:

/home/<user>/.local/bin:/home/<user>/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/usr/sbin

Desktop (please complete the following information):

• Are you using podman, docker or lilipod?
  • podman
• Which version or podman, docker or lilipod?
  • 4.8.2
• Which version of distrobox?
  • 1.6.0.1
• Which host distribution?
  • Fedora Silverblue 39
• How did you install distrobox?
  • rpm-ostree overlay