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

[abailly-akamai]

This is good to go AFAIAC - we don't really need to wait for a lib update

[linode-gh-bot]

Cloud Manager UI test results

🔺 1 failing test on test run #5 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
1 Failing	887 Passing	11 Skipped	46m 34s

Details

Failing Tests
	Spec	Test
❌	object-storage-objects-multicluster.spec.ts	Cloud Manager Cypress Tests→Object Storage Multicluster objects » can upload, access, and delete objects

Troubleshooting

Use this command to re-run the failing tests:

pnpm cy:run -s "cypress/e2e/core/objectStorageMulticluster/object-storage-objects-multicluster.spec.ts"