test/system: Test the resource limits

The following caveats must be noted:

  * Podman sets the Toolbx container's soft limit for the maximum number
    of open file descriptors to the host's hard limit, which is often
    greater than the host's soft limit [1].

  * The ulimit(1) options -b, -k, P and -T don't work on Fedora 38
    because the corresponding resource arguments for getrlimit(2) are
    absent from the operating system.  These are RLIMIT_SBSIZE,
    RLIMIT_KQUEUES, RLIMIT_NPTS and RLIMIT_PTHREAD respectively.

[1] containers/podman#17681

containers#213