Ubuntu Advantage still auto-enabling esm on jammy despite being told not to

# Bug report
Ubuntu Advantage disable auto attach still enables ESM despite using disable_auto_attach and explicitly setting enable to an empty array.

## Steps to reproduce the problem
#cloud-config
ubuntu_advantage:
token:
features:
disable_auto_attach: true
enable: []
enable_beta: []

## Environment details
- Cloud-init version: 23.4.4-0ubuntu0~22.04.1
- Operating System Distribution: Ubuntu 22.04
- Cloud provider, platform or installer type: LXD container

## cloud-init logs
Here are my logs. I forgot to include user-data, but it's exactly what I mentioned above
[cloud-init.tar.gz](https://github.com/canonical/cloud-init/files/4969533/cloud-init.tar.gz)