fix: [UIE-9853], [UIE-9855] - IAM: fix Roles Table layout shifts, disable email input for users without account_admin

[mpolotsk-akamai]

Description 📝

This PR fixes Roles Table layout shifts when switching tabs, and disables email input for users without account_admin

Changes 🔄

List any change(s) relevant to the reviewer.

• disable email input in User Details
• fix UI in Roles Table

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 🗓️

Please specify a release date (and environment, if applicable) to guarantee timely review of this PR. If exact date is not known, please approximate and update it as needed.

Preview 📷

Before	After

How to test 🧪

Prerequisites

• use IAM account (not-admin) with/without account_viewer role

Verification steps

(How to verify changes)

• navigate to /iam/users/[username]/details
• verify that email input is disabled for user with only account_viewer role
• navigate to /iam/users/[username]/roles and switch tab to Entities
• verify that Table elements do not jump when switching tabs.

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]

Confirming changes look good (although i had a hard time reproducing the layout shift)

Thanks @mpolotsk-akamai !

[linode-gh-bot]

Cloud Manager UI test results

🔺 2 failing tests on test run #3 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
2 Failing	828 Passing	11 Skipped	47m 32s

Details

Failing Tests
	Spec	Test
❌	vpc-details-page.spec.ts	Cloud Manager Cypress Tests→VPC details page » can create, edit, and delete a subnet from the VPC details page
❌	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/vpc/vpc-details-page.spec.ts,cypress/e2e/core/linodes/clone-linode.spec.ts"