Attach stdin to container at start if it was created with --interactive

Check to see if the container's start config includes the interactive
flag when determining to attach or ignore stdin stream.

This is in line with behavior of Docker CLI and engine

Signed-off-by: Tyler Ramer <tyaramer@gmail.com>

pkg/adapter/containers.go

@@ -612,7 +612,9 @@ func (r *LocalRuntime) Start(ctx context.Context, c *cliconfig.StartValues, sigP
 		if c.Attach {
 			inputStream := os.Stdin
 			if !c.Interactive {
-				inputStream = nil
+				if !ctr.Stdin() {
+					inputStream = nil
+				}
 			}
 
 			// attach to the container and also start it not already running