fix(lxc): panic when cloning a container with empty IP config

[bpg]

Contributor's Note

• I have added / updated documentation in /docs for any user-facing features or additions.
• I have added / updated acceptance tests in /fwprovider/tests for any new or updated resources / data sources.
• I have ran make example to verify that the change works as expected.

Proof of Work

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Closes #2346

[gemini-code-assist]

Summary of Changes

Hello @bpg, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request resolves a critical bug that caused a panic during the cloning of LXC containers if their IP configuration was not explicitly defined or was empty. The change introduces a safeguard to gracefully handle such scenarios, ensuring that container cloning operations proceed without unexpected crashes and improving the overall stability of the system.

Highlights

• Bug Fix: Addressed a panic that occurred when attempting to clone an LXC container with an empty IP configuration.
• Robustness: Implemented a nil check within the IP configuration processing logic to prevent crashes when encountering empty or malformed IP configuration blocks during container cloning.

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[gemini-code-assist]

Code Review

This pull request addresses a panic that occurs when cloning a container with an empty IP configuration. The change adds a nil check within the loop that processes initializationIPConfig in the containerCreateClone function. This prevents a panic from a nil pointer dereference during type assertion. The fix is correct, straightforward, and makes the code more robust. It also brings consistency with similar loops in other functions like containerCreateCustom and containerUpdate which already have this check. The change is approved.