feat: [UIE-10536] - IAM: divider component

[aaleksee-akamai]

Description 📝

This PR adds a new divider component for IAM, replacing the old one from the linode library.

Changes 🔄

List any change(s) relevant to the reviewer.

• Add a new component
• Add tests

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 📷

Before	After
devcloud	localhost

How to test 🧪

Prerequisites

(How to setup test environment)

• use iam account

Reproduction steps

(How to reproduce the issue, if applicable)

• go to /iam/roles and assign more than 1 role
• go to /iam/users/username/roles and assign more than 1 role

Verification steps

(How to verify changes)

• The new divider components should look the same as the old one.

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

[linode-gh-bot]

Cloud Manager UI test results

🔺 14 failing tests on test run #2 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
14 Failing	874 Passing	11 Skipped	64m 35s

Details

Failing Tests
	Spec	Test
❌	create-linode-from-image.spec.ts	Cloud Manager Cypress Tests→create linode from image, mocked data » creates linode from image on images tab
❌	alerts-create.spec.ts	Cloud Manager Cypress Tests→Create flow when beta alerts enabled by region and feature flag » create flow after switching to beta alerts
❌	alerts-create.spec.ts	Cloud Manager Cypress Tests→Create flow when beta alerts enabled by region and feature flag » can toggle from legacy to beta alerts and back to legacy
❌	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 create and delete object storage buckets
❌	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
❌	smoke-create-image.spec.ts	Cloud Manager Cypress Tests→create image (using mocks) » create image from a linode
❌	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

Troubleshooting

Use this command to re-run the failing tests:

pnpm cy:run -s "cypress/e2e/core/images/create-linode-from-image.spec.ts,cypress/e2e/core/linodes/alerts-create.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/images/images-empty-landing-page.spec.ts,cypress/e2e/core/images/smoke-create-image.spec.ts,cypress/e2e/core/linodes/rebuild-linode.spec.ts"