only add data prop with inline queries

[AlecAivazis]

Fixes #602

This PR tweaks the load generator so that it only adds enforces a data prop when there are inline queries that would use it

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Name	Status	Preview	Updated
docs-next	✅ Ready (Inspect)	Visit Preview	Oct 21, 2022 at 0:00AM (UTC)

[changeset-bot]

🦋 Changeset detected

Latest commit: d9a8cb5

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

This PR includes changesets to release 2 packages

Name	Type
houdini-svelte	Patch
houdini	Patch

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