Bump github.com/containers/storage from 1.26.0 to 1.29.0

Bumps [github.com/containers/storage](https://github.com/containers/storage) from 1.26.0 to 1.29.0.
- [Release notes](https://github.com/containers/storage/releases)
- [Changelog](https://github.com/containers/storage/blob/master/docs/containers-storage-changes.md)
- [Commits](https://github.com/containers/storage/compare/v1.26.0...v1.29.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/common/pkg/auth/auth.go

@@ -22,9 +22,7 @@ import (
 func GetDefaultAuthFile() string {
 	authfile := os.Getenv("REGISTRY_AUTH_FILE")
 	if authfile == "" {
-		if authfile, ok := os.LookupEnv("DOCKER_CONFIG"); ok {
-			logrus.Infof("Using DOCKER_CONFIG environment variable for authfile path %s", authfile)
-		}
+		authfile = os.Getenv("DOCKER_CONFIG")
 	}
 	return authfile
 }