Migrate CodeceptJS to ESM (Top-level await)

#### What are you trying to achieve?
I need to use top-level `await` to retrieve config from AWS and other APIs but CodeceptJS seems completely incompatible with ES modules. Top-level await is simply not possible in CommonJS. Are there any plans to support ES modules?

#### What do you get instead?

If you set `"type": "module"` in `package.json` you get this error:

```bash
Error [ERR_REQUIRE_ESM]: require() of ES Module /Users/REDACTED/config/codecept.conf.js from /Users/REDACTED/node_modules/codeceptjs/lib/config.js not supported.
Instead change the require of codecept.conf.js in /Users/REDACTED/node_modules/codeceptjs/lib/config.js to a dynamic import() which is available in all CommonJS modules.
at loadConfigFile (/Users/REDACTED/node_modules/codeceptjs/lib/config.js:160:26)
at Config.load (/Users/REDACTED/node_modules/codeceptjs/lib/config.js:91:14)
at module.exports.getConfig (/Users/REDACTED/node_modules/codeceptjs/lib/command/utils.js:14:33)
at module.exports (/Users/REDACTED/node_modules/codeceptjs/lib/command/run.js:18:16)
at Command. (/Users/REDACTED/node_modules/codeceptjs/bin/codecept.js:9:11)
```

### Details

* CodeceptJS version: 3.5.13-beta.3
* NodeJS Version: v20.10.0
* Operating System: MacOS Ventura