Ensure we generate a 'stopped' event on force-remove

When forcibly removing a container, we are initiating an explicit
stop of the container, which is not reflected in 'podman events'.
Swap to using our standard 'stop()' function instead of a custom
one for force-remove, and move the event into the internal stop
function (so internal calls also register it).

This does add one more database save() to `podman remove`. This
should not be a terribly serious performance hit, and does have
the desirable side effect of making things generally safer.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>

libpod/container_internal.go

@@ -1108,7 +1108,13 @@ func (c *Container) stop(timeout uint) error {
 	}
 
 	// Wait until we have an exit file, and sync once we do
-	return c.waitForExitFileAndSync()
+	if err := c.waitForExitFileAndSync(); err != nil {
+		return err
+	}
+
+	c.newContainerEvent(events.Stop)
+
+	return nil
 }
 
 // Internal, non-locking function to pause a container