test: [M3-10492] - Prepare Cypress tests for IAM navigation feature flag flip

[jdamore-linode]

Description 📝

This updates our Cypress tests that had previously been mocking the IAM feature flag to be disabled so that they now pass with the flag enabled.

Changes 🔄

• Mocks the iamRbacPrimaryNavChanges feature flag to be enabled in tests that had previously been mocking it to be disabled
• Adjust tests as needed so that they pass when iamRbacPrimaryNavChanges is enabled
• Removes the iamRbacPrimaryNavChanges mock in tests that already pass when the feature flag is enabled and disabled
• Skip a couple tests that are currently failing due to bugs
• Add documentation, comments, etc. to help with clean up/bug fixes

Scope 🚢

Upon production release, changes in this PR will be visible to:

• All customers
• Some customers (e.g. in Beta or Limited Availability)
• No customers / Not applicable

Target release date 🗓️

8/26/2026

How to test 🧪

We can rely on CI for this. Alternatively, you can use the following command to run all of the tests that were touched by this PR:

pnpm cy:run -s "cypress/e2e/core/account/account-maintenance.spec.ts,cypress/e2e/core/account/quotas-nav.spec.ts,cypress/e2e/core/account/restricted-user-details-pages.spec.ts,cypress/e2e/core/account/service-transfer.spec.ts,cypress/e2e/core/billing/billing-contact.spec.ts,cypress/e2e/core/billing/billing-invoices.spec.ts,cypress/e2e/core/billing/credit-card-expired-banner.spec.ts,cypress/e2e/core/billing/google-pay.spec.ts,cypress/e2e/core/billing/restricted-user-billing.spec.ts,cypress/e2e/core/billing/smoke-billing-activity.spec.ts,cypress/e2e/core/general/smoke-deep-link.spec.ts,cypress/e2e/core/linodes/rebuild-linode.spec.ts,cypress/e2e/core/linodes/smoke-delete-linode.spec.ts,cypress/e2e/core/linodes/smoke-linode-landing-table.spec.ts,cypress/e2e/core/notificationsAndEvents/qemu-reboot-upgrade-notice.spec.ts,cypress/e2e/core/parentChild/account-switching.spec.ts"

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 tests and CI checks are passing
• TypeScript compilation succeeded without errors
• Code passes all linting rules

[dwiley-akamai]

CI is in good shape 🚀

[linode-gh-bot]

Cloud Manager UI test results

🎉 731 passing tests on test run #13 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
0 Failing	731 Passing	4 Skipped	115m 29s