Failed to remove a pod which contains containers created with podman-remote

Issue

• When we remove a pod which contains containers created with podman-remote, it is possible that podman fails to remove the pod with an error message as shown below. This bug has occurred when the container to be removed only exists.

  Error: error removing container 6b587caef6ef5274eb2b1df7fac0cfe0c7ed548f4c97533d238d54c6beeba470 root filesystem: 1 error occurred:
      * unlinkat /var/lib/containers/storage/overlay/ad61b5c3e5e221e9fc4411a2c7713aefa8701d1be3ef67683c13d22bc6ee48a1/merged: device or resource busy
  

• The status of the remained pod is "Error" and we can't remove the pod with the rm command.

      # podman pod ps
      POD ID        NAME        STATUS      CREATED        INFRA ID      # OF CONTAINERS
      1161fd4c103b  testpo      Error       3 minutes ago  9b481b7e04c1  2
      WARN[0000] Found incomplete layer "8af6de096453419622bbcdcf673d85ac22416f91e3e3f7bf0eac0168bacbe6f4", deleting it
  
      # podman pod rm -f testpo
      Error: error freeing lock for container 9b481b7e04c1f2f3ecde8ed057c356d8165e35ccc2eb56a1c3c518ac254a9c7c: no such file or directory
  

  Also the status of the remained container is "Removing" and we can't remove the infra container.

      # podman ps -a
      CONTAINER ID  IMAGE                                    COMMAND     CREATED             STATUS      PORTS       NAMES
      9b481b7e04c1  localhost/podman-pause:4.2.0-1661526018              About a minute ago  Removing                1161fd4c103b-infra
      6b587caef6ef  registry.access.redhat.com/ubi8:latest   sleep inf   About a minute ago  Removing                testcon
      WARN[0000] Found incomplete layer "8af6de096453419622bbcdcf673d85ac22416f91e3e3f7bf0eac0168bacbe6f4", deleting it
  
      # podman rm -f 1161fd4c103b-infra
      Error: container 9b481b7e04c1f2f3ecde8ed057c356d8165e35ccc2eb56a1c3c518ac254a9c7c is the infra container of pod 1161fd4c103b58c76eb9e5ab4852e7a7b72af42306070b6b17ac46eeeab7ba21 and cannot be removed without removing the pod
  

• The mount points are remained and cannot be unmounted.

      # mount | grep /var/lib/containers/storage
      overlay on /var/lib/containers/storage/overlay/8af6de096453419622bbcdcf673d85ac22416f91e3e3f7bf0eac0168bacbe6f4/merged type overlay (rw,nodev,relatime,context="system_u:object_r:container_file_t:s0:c7,c445",lowerdir=/var/lib/containers/storage/overlay/l/QAGE442XL5GDRWPDXETXQQPAJZ,upperdir=/var/lib/containers/storage/overlay/8af6de096453419622bbcdcf673d85ac22416f91e3e3f7bf0eac0168bacbe6f4/diff,workdir=/var/lib/containers/storage/overlay/8af6de096453419622bbcdcf673d85ac22416f91e3e3f7bf0eac0168bacbe6f4/work,metacopy=on)
      overlay on /var/lib/containers/storage/overlay/ad61b5c3e5e221e9fc4411a2c7713aefa8701d1be3ef67683c13d22bc6ee48a1/merged type overlay (rw,nodev,relatime,context="system_u:object_r:container_file_t:s0:c7,c445",lowerdir=/var/lib/containers/storage/overlay/l/IPMRCYO6E7Y2645DHNHQF3ESCO,upperdir=/var/lib/containers/storage/overlay/ad61b5c3e5e221e9fc4411a2c7713aefa8701d1be3ef67683c13d22bc6ee48a1/diff,workdir=/var/lib/containers/storage/overlay/ad61b5c3e5e221e9fc4411a2c7713aefa8701d1be3ef67683c13d22bc6ee48a1/work,metacopy=on)
      /dev/mapper/rhel-root on /var/lib/containers/storage/overlay type xfs (rw,relatime,seclabel,attr2,inode64,logbufs=8,logbsize=32k,noquota)
  
      # umount var/lib/containers/storage/overlay/8af6de096453419622bbcdcf673d85ac22416f91e3e3f7bf0eac0168bacbe6f4/merged
      umount: var/lib/containers/storage/overlay/8af6de096453419622bbcdcf673d85ac22416f91e3e3f7bf0eac0168bacbe6f4/merged: no mount point specified.
      # umount /var/lib/containers/storage/overlay/ad61b5c3e5e221e9fc4411a2c7713aefa8701d1be3ef67683c13d22bc6ee48a1/merged
      umount: /var/lib/containers/storage/overlay/ad61b5c3e5e221e9fc4411a2c7713aefa8701d1be3ef67683c13d22bc6ee48a1/merged: not mounted.