feat(scaffolder): create new tempdir for result

plugins/scaffolder-backend/src/scaffolder/templater/cookiecutter.ts

@@ -48,10 +48,7 @@ export class CookieCutter implements TemplaterBase {
     await fs.writeJSON(`${options.directory}/cookiecutter.json`, cookieInfo);
 
     const templateDir = options.directory;
-
-    // TODO(blam): This should be an entirely different directory on the host machine
-    // not in the template directory
-    const resultDir = `${templateDir}/result`;
+    const resultDir = await fs.promises.mkdtemp(`${options.directory}-result`);
 
     await runDockerContainer({
       imageName: 'backstage/cookiecutter',