feat(migrate): remove handleRenderingErrors from sveltekit config

[manuel3108]

Relates #1124

Description

See sveltejs/kit#16265. Property needs to be removed during migration

Checklist

• Update snapshots (if applicable)
• Add a changeset (if applicable)
• Allow maintainers to edit this PR
• I care about what I'm doing, no matter the tool I use (Notepad, Sublime, VSCode, AI...)

[pkg-svelte-dev]

Install the latest version of sv from 5638bb6:

pnpm add https://pkg.svelte.dev/sv/c/5638bb62e4e183129d1b01c9ffbba016a3a86b35

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/cli/pr/1242

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5638bb6

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

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[svelte-docs-bot]

Preview: https://svelte-dev-git-preview-cli-1242-svelte.vercel.app/