Clean install Debian 13 on VMware ESXi identified possible datasources for system []

# Bug report
cloud init show me huge warning message, which told me to fill BUG report, so I filling bug report. I see cloud-init for 1 hour and I do not know what it means.

## Steps to reproduce the problem
Install fresh expert debian 13 just with SSH, without gui, withou user (just root) on VMware ESXi 7.0 hypervisor

## Environment details
- Cloud-init version: 25.1.4
- Operating System Distribution:
```
PRETTY_NAME="Debian GNU/Linux 13 (trixie)"
NAME="Debian GNU/Linux"
VERSION_ID="13"
VERSION="13 (trixie)"
VERSION_CODENAME=trixie
DEBIAN_VERSION_FULL=13.1
```
- Cloud provider, platform or installer type: VMware ESXi, x86_64, fresh Debian 13 installed from netinstall ISO

## cloud-init logs

`The --include-userdata flag is deprecated and does nothing.`

[cloud-init.tar.gz](https://github.com/user-attachments/files/22886544/cloud-init.tar.gz)

Regards
Petr

No source file or test is identified. Start by reproducing the fresh Debian 13 installation on VMware ESXi and inspecting cloud-init.tar.gz, then determine what the reported warning means and whether it reflects an actual failure; the issue needs a documented explanation or a clearly scoped fix before completion can be verified.

Written by the indexing model from the issue text.