feat: [UIE-10778], [UIE-10777] - IAM LA/New flag fix, text update

[mpolotsk-akamai]

Description 📝

This PR removes the "Limited Availability" badge since IAM is now fully rolled out to all users.
A new flag has been introduced to control the visibility of the "NEW" badge independently. All logic related to iamLimitedAvailabilityBadges has been removed. Updated text for User Account Delegations when there are no search results.

Changes 🔄

List any change(s) relevant to the reviewer.

• Removed the "Limited Availability" badge
• Add a new flag to control the display of the "NEW" badge
• Removed iamLimitedAvailabilityBadges flag and all related logic
• Updated text for User Account Delegations when there are no search results

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

Preview 📷

Include a screenshot <img src="" /> or video <video src="" /> of the change.

🔒 Use the Mask Sensitive Data setting for security.

💡 For changes requiring multiple steps to validate, prefer a video for clarity.

Before	After

How to test 🧪

Prerequisites

(How to setup test environment)

• use IAM Parent/Child account

Verification steps

(How to verify changes)

• Verify that the "Limited Availability" badge is no longer displayed anywhere in IAM
• Verify that the "NEW" badge is displayed only when the new flag is enabled
• Disable the new "NEW" flag and confirm the badge is not shown

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

[abailly-akamai]

Looks great thx @mpolotsk-akamai !

[linode-gh-bot]

Cloud Manager UI test results

🔺 14 failing tests on test run #3 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
14 Failing	888 Passing	11 Skipped	65m 41s

Details

Failing Tests
	Spec	Test
❌	rebuild-linode.spec.ts	Cloud Manager Cypress Tests→rebuild linode » rebuilds a linode from Image
❌	rebuild-linode.spec.ts	Cloud Manager Cypress Tests→rebuild linode » rebuilds a linode from Community StackScript
❌	rebuild-linode.spec.ts	Cloud Manager Cypress Tests→rebuild linode » rebuilds a linode from Account StackScript
❌	rebuild-linode.spec.ts	Cloud Manager Cypress Tests→rebuild linode » cannot rebuild a provisioning linode
❌	rebuild-linode.spec.ts	Cloud Manager Cypress Tests→rebuild linode » can rebuild a Linode reusing existing user data
❌	rebuild-linode.spec.ts	Cloud Manager Cypress Tests→rebuild linode » can rebuild a linode with the GECKO is enabled
❌	smoke-create-image.spec.ts	Cloud Manager Cypress Tests→create image (using mocks) » create image from a linode
❌	create-image.spec.ts	Cloud Manager Cypress Tests→create image (e2e) » create image from a linode
❌	images-non-empty-landing-page.spec.ts	Cloud Manager Cypress Tests→image landing checks for non-empty state with restricted user » checks restricted user with read access has no access to create image and can see existing images
❌	object-storage.e2e.spec.ts	Cloud Manager Cypress Tests→object storage end-to-end tests » can update bucket access
❌	restricted-user-details-pages.spec.ts	Cloud Manager Cypress Tests→restricted user details pages » should disable action elements and buttons in the 'Images' details page
❌	create-linode-from-image.spec.ts	Cloud Manager Cypress Tests→create linode from image, mocked data » creates linode from image on images tab
❌	images-empty-landing-page.spec.ts	Cloud Manager Cypress Tests→Images empty landing page » shows the empty state when there are no images
❌	images-empty-landing-page.spec.ts	Cloud Manager Cypress Tests→Images empty landing page » checks restricted user has no access to create Image on Image landing page

Troubleshooting

Use this command to re-run the failing tests:

pnpm cy:run -s "cypress/e2e/core/linodes/rebuild-linode.spec.ts,cypress/e2e/core/images/smoke-create-image.spec.ts,cypress/e2e/core/images/create-image.spec.ts,cypress/e2e/core/images/images-non-empty-landing-page.spec.ts,cypress/e2e/core/objectStorage/object-storage.e2e.spec.ts,cypress/e2e/core/account/restricted-user-details-pages.spec.ts,cypress/e2e/core/images/create-linode-from-image.spec.ts,cypress/e2e/core/images/images-empty-landing-page.spec.ts"