fix: [M3-7822] - Prevent Modification of Linode config 'interfaces' Array on No Changes

[cpathipa]

Description 📝

This PR prevents modifying the value of a Linode config's 'interfaces': [] with defaults in the payload when there are no changes made. Refer to the ticket for more details.

Target release date 🗓️

5/13

Preview 📷

How to test 🧪

Verification steps

(How to verify changes)

• Create a linode.
• Navigate to linode config and click on edit button.
• Make no changes and click on save.
• Observe the payload, there shouldn't be any override's to the interfaces array with defaults. (ex: if interfaces: [] it should stay like that and not be modified)
• Ensure there is no regression for Add/ Edit and deleting configurations.

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[github-actions]

Coverage Report: ✅
Base Coverage: 82.02%
Current Coverage: 82.02%

[dwiley-akamai]

Fix confirmed, no regressions observed ✅
Code review ✅

[dwiley-akamai]

Seems like the previous logic was failing because of the presence of ip_ranges on the defaultInterface

[mjac0bs]

Confirmed a public interface in eth0 isn't sent in the interfaces list when a config is added or edited. Tested other interface combinations for regressions and confirmed those updated the interface list in the request as expected.