fix: [UIE-9840] - IAM: Remove Role filter (already assigned roles) in ChangeRoleDrawer

[abailly-akamai]

Description 📝

In the User Assigned Roles UI, when trying to change role to another (Change Role drawer) but already has entities assigned to a role, those roles are filtered out, resulting in the user potentially being confused. The API allows to PUT to the same role with same or different entities so we should allow it too.

Changes 🔄

• Remove already assigned roles Role filter in <ChangeRoleDrawer />

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

How to test 🧪

Prerequisites

An IAM account with admin role

Reproduction steps

Consider assigning entities to similar roles. ex:

• Navigate to /iam/users//roles
• Open the "Change Role" drawer for one of the firewalls
• ⛔ Can't select one of the similar roles

Verification steps

• Navigate to /iam/users//entities
• Open the "Change Role" drawer for one of the firewalls
• ✅ Similar roles are all available

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

🔺 1 failing test on test run #4 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
1 Failing	866 Passing	11 Skipped	44m 12s

Details

Failing Tests
	Spec	Test
❌	clone-linode.spec.ts	Cloud Manager Cypress Tests→clone linode » can clone a Linode from Linode details page

Troubleshooting

Use this command to re-run the failing tests:

pnpm cy:run -s "cypress/e2e/core/linodes/clone-linode.spec.ts"