upcoming: [M3-10125] - Add feature flag support for Cloud NAT

[hana-akamai]

Description 📝

Add feature flag support for Cloud NAT

Preview 📷

Dev Tools	LD response

How to test 🧪

Verification steps

(How to verify changes)

• [ ] Checkout this PR or PR preview link
• [ ] Verify Cloud NAT is present in the Dev Tools Feature Flags section
• [ ] Verify Cloud NAT in the LD response

Author Checklists

As an Author, to speed up the review process, I considered 🤔

👀 Doing a self review ❔ Our contribution guidelines 🤏 Splitting feature into small PRs ➕ Adding a changeset 🧪 Providing/improving test coverage 🔐 Removing all sensitive information from the code and PR description 🚩 Using a feature flag to protect the release 👣 Providing comprehensive reproduction steps 📑 Providing or updating our documentation 🕛 Scheduling a pair reviewing session 📱 Providing mobile support ♿ Providing accessibility support

• [ ] I have read and considered all applicable items listed above.

As an Author, before moving this PR from Draft to Open, I confirmed ✅

• [ ] All unit tests are passing
• [ ] TypeScript compilation succeeded without errors
• [ ] Code passes all linting rules

[hana-akamai]

@bill-akamai yes, thanks for catching!

[linode-gh-bot]

Cloud Manager UI test results

:tada: 659 passing tests on test run #2 ↗︎

:x: Failing	:white_check_mark: Passing	:arrow_right_hook: Skipped	:clock1: Duration
0 Failing	659 Passing	4 Skipped	116m 58s