fix: [M3-8500] - Restricted users without account access unable to create Linodes on Linode Create v2

[bnussman-akamai]

Description 📝

• Updates Linode Create v2 to be in parity with Linode Create v1 when it comes to a restricted user creating a Linode in an EU region

The Bug 🐛

• On Linode Create v2, if a user with add_linodes access, but with no account/billing permissions tried to create a LInode, they would see an infinite loading spinner. This is because Cloud Manager was trying to GET /v4/account/agreemeents, but failed to because the endpoint will 403 for this restricted user.

The Fix 🔧

• Allow restricted users with add_linodes access but with no account/billing permissions to create Linodes regardless of the account's agreements.
• This seems questionable, but this is what Linode Create v1 intentionally did. See https://github.com/linode/manager/pull/7901

Target release date 🗓️

9/3/24

Preview 📷

Before	After
User would see an infinite loading spinner	User can create a Linode

How to test 🧪

Prerequisites

• Create a restricted user on your account with the following permissions
  • add_linodes: true (Can add Linodes to this account in the UI)
  • account_access: null (No billing access in the UI)

Reproduction steps

• Login as the restricted user
• Try to create a LInode in an EU region
• Observe an infinite loading spinner when you click "Create Linode" button

Verification steps

• Repeat the "Reproduction steps" with this PR checked out
• Rather than seeing an infinite loading spinner, you should be able to successfully create a Linode in an EU region

As an Author I have 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

[github-actions[bot]]

Coverage Report: ✅
Base Coverage: 82.73%
Current Coverage: 82.73%