Update Images() to allow retrieving specific image size data

Those data include:
 - size of data shared with other images
 - size of data unique to a given image
 - how many containers are using a given image

Signed-off-by: Kenfe-Mickael Laventure <mickael.laventure@gmail.com>
Upstream-commit: 82dc15836b
Component: cli

components/cli/command/formatter/image.go

@@ -225,5 +225,6 @@ func (c *imageContext) CreatedAt() string {
 
 func (c *imageContext) Size() string {
 	c.AddHeader(sizeHeader)
-	return units.HumanSizeWithPrecision(float64(c.i.Size), 3)
+	//NOTE: For backward compatibility we need to return VirtualSize
+	return units.HumanSizeWithPrecision(float64(c.i.VirtualSize), 3)
 }