fix: [M3-10435] - ImageSelect, UserData Bug Fixes

[jaalah-akamai]

Description 📝

This PR addresses a critical React anti-pattern where the ImageSelect component was calling onChange during the render phase, causing the error "Cannot update a component (UserData) while rendering a different component (ImageSelect)".

The fix moves the auto-selection logic to a useEffect hook to ensure state updates happen after rendering is complete.

Changes 🔄

• Fix setState during render in ImageSelect: Moved the auto-selection logic from render phase to useEffect hook to prevent React warnings about updating components during render
• Added hasBorder to omitted props for StyledFlag
• Removed User Data icon/tooltip responsible for invalid HTML: Button within Button

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 🗓️

N/A

Before	After
	user-data.mov
	Fixed

How to test 🧪

Verification steps

• Go to /linodes/create/marketplace
• Select a region and observe hasBorder error no longer occurs
• If the chosen app has User Data, observe the new layout where the description is exposed. Tooltip has been removed
• When selecting images, observe the render issue is no longer displayed in console.

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

[jaalah-akamai]

Waiting for UX response before proceeding

Good to go!

[linode-gh-bot]

Cloud Manager UI test results

🎉 730 passing tests on test run #8 ↗︎

❌ Failing	✅ Passing	↪️ Skipped	🕐 Duration
0 Failing	730 Passing	4 Skipped	131m 56s