fix: Duplicate virtual +layout.js files

[knd775]

Duplicate +layout.js files were being created in the root directory. This was an issue without side effects until sveltekit 1.15.5, which added a duplicate check. This fix allows houdini to work in sveltekit again.

To help everyone out, please make sure your PR does the following:

• Update the first line to point to the ticket that this PR fixes
• Add a message that clearly describes the fix
• If applicable, add a test that would fail without this fix
• Make sure the unit and integration tests pass locally with pnpm run tests and cd integration && pnpm run tests
• Includes a changeset if your fix affects the user with pnpm changeset

[changeset-bot]

🦋 Changeset detected

Latest commit: 742a748

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
houdini-svelte	Patch
houdini-plugin-svelte-global-stores	Patch
houdini-react	Patch
houdini	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

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[AlecAivazis]

Thanks for getting this together! Mind running prettier really quickly?

[knd775]

Thanks for getting this together! Mind running prettier really quickly?

Done!