fix: Pass interface string to get_newest_lease()

[goldberl]

Proposed Commit Message

fix: Pass interface string to get_newest_lease()

In DataSourceCloudStack.py, get_newest_lease() is currently being
passed a Distro object, causing a Python type error. This PR
changes the Distro object to the interface string to fix this error.

Additional Context

In a CloudStack environment, when launching a Noble instance cloud-init was failing with the following error:

Running invalid command: ['dhcpcd', '--dumplease', '--ipv4only', <cloudinit.distros.ubuntu.Distro object at 0x7315e34d1df0>]

This error does not show up on Jammy, only Noble.

To fix this type error, the argument passed to get_newest_lease() in DataSourceCloudStack.py was changed from a Distro object to a string.

Test Steps

1. Set up a CloudStack environment and launch a Noble instance on it
2. See cloud-init logs

Merge type

• Squash merge using "Proposed Commit Message"
• Rebase and merge unique commits. Requires commit messages per-commit each referencing the pull request number (#<PR_NUM>)

[holmanb]

Thanks @goldberl!