docs: clarify useLazyQuery data is undefined until trigger

[Hashim1999164]

Summary

• Clarify that useLazyQuery keeps data undefined and the result uninitialized until trigger is called, even when matching cache data already exists.
• Update the UseLazyQuery JSDoc and the hooks API page Returns section so they match that behavior.

Fixes #4094

Test plan

• Review the UseLazyQuery summary rendered on the hooks API docs page
• Confirm the wording matches known lazy-query behavior (no store data until first trigger)

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commit: c1f00c1

[Hashim1999164]

Removed the misleading cache-data clause from both the generated API docs source and the reference docs. The text now states only that the lazy query remains uninitialized with undefined data before the first trigger.