Make E2E config link non-interactive

[alfonso-noriega]

What

Makes the E2E app config link helper run non-interactively when creating the secondary app in app-deploy.spec.ts.

• Adds hidden app config link --new-app-name support for tests/automation.
• Treats a provided new app name like a name flag: create a new app directly and skip the create/select + app-name prompts.
• Updates the E2E helper to use cli.exec() with --organization-id and --new-app-name instead of driving Ink prompts through PTY timing sleeps.

Why

PR #7803 exposed a separate flake: app config link could receive Enter before Ink had consumed/rendered typed prompt input, causing the org selector or app-name prompt to submit stale state. In the failing run the prompt visibly showed the secondary app name, but validation still reported App name can't be empty, and the process eventually timed out.

This removes that timing-sensitive prompt automation from the E2E path.

Testing

• pnpm --filter @shopify/app vitest src/cli/services/dev/select-app.test.ts src/cli/services/app/config/link.test.ts --run
• pnpm --filter @shopify/app lint
• pnpm --filter e2e lint

Attempted, but blocked by existing cli-kit:build missing GraphiQL dependency errors (h3, react-dom/server, @shopify/polaris, @shopify/polaris-icons):

• pnpm --filter @shopify/app type-check
• pnpm --filter e2e type-check

[alfonso-noriega]

• Make E2E config link non-interactive #7809 👈 (View in Graphite)
• main

This stack of pull requests is managed by Graphite. Learn more about stacking.