Fix execa usage for v9 compatibility

Agent-Logs-Url: https://github.com/emberjs/ember.js/sessions/6e22ff52-5de4-40d6-83cf-d3894f2f986b

Co-authored-by: kategengler <444218+kategengler@users.noreply.github.com>

Author: Copilot

bin/benchmark/utils.mjs

@@ -5,7 +5,7 @@ import { fileURLToPath } from 'node:url';
 import { basename, join } from 'node:path';
 import { styleText } from 'node:util';
 
-import execa from 'execa';
+import { execa } from 'execa';
 import fs from 'fs-extra';
 import { existsSync } from 'node:fs';
 

bin/build-for-publishing.js

@@ -2,15 +2,13 @@
 
 const fs = require('fs');
 const path = require('path');
-const execa = require('execa');
 const buildInfo = require('../broccoli/build-info').buildInfo();
 
-function exec(command, args) {
+async function exec(command, args) {
+  const { execa } = await import('execa');
   // eslint-disable-next-line
   console.log(`\n\tRunning: \`${command} ${args.join(' ')}\``);
-  let stream = execa(command, args);
-  stream.stdout.pipe(process.stdout);
-  return stream;
+  return execa(command, args, { stdout: 'inherit', stderr: 'inherit' });
 }
 
 /*

bin/run-browserstack-tests.js

@@ -1,16 +1,12 @@
 /* eslint-disable no-console */
 
-const execa = require('execa');
 const chalk = require('chalk');
 
-function run(command, args = []) {
+async function run(command, args = []) {
+  const { execa } = await import('execa');
   console.log(chalk.dim('$ ' + command + ' ' + args.join(' ')));
 
-  let p = execa(command, args);
-  p.stdout.pipe(process.stdout);
-  p.stderr.pipe(process.stderr);
-
-  return p;
+  return execa(command, args, { stdout: 'inherit', stderr: 'inherit' });
 }
 
 (async function () {