remove container/pod id file along with container/pod

Remove the container/pod ID file along with the container/pod.  It's
primarily used in the context of systemd and are not useful nor needed
once a container/pod has ceased to exist.

Fixes: #16387
Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

docs/source/markdown/options/cidfile.write.md

@@ -4,4 +4,4 @@
 ####> are applicable to all of those.
 #### **--cidfile**=*file*
 
-Write the container ID to *file*.
+Write the container ID to *file*.  The file will be removed along with the container.

docs/source/markdown/podman-pod-rm.1.md.in

@@ -26,6 +26,7 @@ Stop running containers and delete all stopped containers before removal of pod.
 Instead of providing the pod name or ID, remove the last created pod. (This option is not available with the remote Podman client, including Mac and Windows (excluding WSL2) machines)
 
 @@option pod-id-file.pod
+If specified, the pod-id-file will be removed along with the pod.
 
 @@option time
 

docs/source/markdown/podman-rm.1.md.in

@@ -57,6 +57,8 @@ In addition, forcing can be used to remove unusable containers, e.g. containers
 whose OCI runtime has become unavailable.
 
 @@option ignore
+Further ignore when the specified `--cidfile` does not exist as it may have
+already been removed along with the container.
 
 #### **--latest**, **-l**