Fix: CF list item ID duplication on creation

[agesta23]

This PR addresses an issue where multiple cloudflare_list_item resources were assigned the same ID during creation. By refining the logic for determining the item's ID post-creation, we can ensure that each cloudflare_list_item gets its unique and correct ID, thus reflecting its actual state in Cloudflare.

[github-actions]

changelog detected ✅

[github-actions]

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[jacobbednarz]

thanks for the time you've put into this PR! however, this really needs to be fixed in the service itself otherwise it will be a bug for other list item types and we don't currently have a way to fetch just a single record. there is already work under way for this internally so once that lands, we'll raise a PR to fix this in the provider.