Generate cloud-config outside of cidata.iso too

[afbjorklund]

This does not include any mounts, networks, nor boot scripts.
It is assumed that "reverse-sshfs" is being used, for mounts.

It also does not include lima-guestagent, nerdctl-full.tgz,
or any of the provisioning scripts that are in the cidata...

• #2268
• #2028

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Closes #2268

[afbjorklund]

Note for testing, it is possible to extract the user-data of a started instance:

isoinfo -R -i ~/.lima/default/cidata.iso -x /user-data

You could also mount the CD and copy the user-data file, but that is more work.

The new file is in ~/.lima/default/cloud-config.yaml

[afbjorklund]

Seems like I managed to lock myself out of the home directory in CI, by thinko with "mode"

If the file does not exist, WriteFile creates it with permissions perm (before umask); otherwise WriteFile truncates it before writing, without changing permissions.

So need to clean up the home directory, or add some workaround to remove the old files.

level=error msg="[hostagent] open /Users/runner/.lima/default/cloud-config.yaml: permission denied" fields.level=fatal