bump containers/image to v5.0.0, buildah to v1.11.4

Move to containers/image v5 and containers/buildah to v1.11.4.

Replace an equality check with a type assertion when checking for a
docker.ErrUnauthorizedForCredentials in `podman login`.

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

vendor/github.com/containers/image/v5/docker/errors.go

@@ -0,0 +1,43 @@
+package docker
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/docker/distribution/registry/client"
+	perrors "github.com/pkg/errors"
+)
+
+var (
+	// ErrV1NotSupported is returned when we're trying to talk to a
+	// docker V1 registry.
+	ErrV1NotSupported = errors.New("can't talk to a V1 docker registry")
+	// ErrTooManyRequests is returned when the status code returned is 429
+	ErrTooManyRequests = errors.New("too many request to registry")
+)
+
+// ErrUnauthorizedForCredentials is returned when the status code returned is 401
+type ErrUnauthorizedForCredentials struct { // We only use a struct to allow a type assertion, without limiting the contents of the error otherwise.
+	Err error
+}
+
+func (e ErrUnauthorizedForCredentials) Error() string {
+	return fmt.Sprintf("unable to retrieve auth token: invalid username/password: %s", e.Err.Error())
+}
+
+// httpResponseToError translates the https.Response into an error. It returns
+// nil if the response is not considered an error.
+func httpResponseToError(res *http.Response) error {
+	switch res.StatusCode {
+	case http.StatusOK:
+		return nil
+	case http.StatusTooManyRequests:
+		return ErrTooManyRequests
+	case http.StatusUnauthorized:
+		err := client.HandleErrorResponse(res)
+		return ErrUnauthorizedForCredentials{Err: err}
+	default:
+		return perrors.Errorf("invalid status code from registry %d (%s)", res.StatusCode, http.StatusText(res.StatusCode))
+	}
+}