Backport: Hide given credentials for migrated repos. (#9098)

CloneAddr was being used as OriginalURL.
Now passing OriginalURL through from the form and saving it.

models/task.go

@@ -196,7 +196,7 @@ func CreateMigrateTask(doer, u *User, opts base.MigrateOptions) (*Task, error) {
 	repo, err := CreateRepository(doer, u, CreateRepoOptions{
 		Name:        opts.RepoName,
 		Description: opts.Description,
-		OriginalURL: opts.CloneAddr,
+		OriginalURL: opts.OriginalURL,
 		IsPrivate:   opts.Private,
 		IsMirror:    opts.Mirror,
 		Status:      RepositoryBeingMigrated,