Fix: Throw an error for empty array return in `generateStaticParams` with `output:export` (#57053)
Fixes #57038
# What?
Added an error message when `generateStaticParams` returns an empty
array with `output:export`.
# Why?
To provide developers with clear feedback when `generateStaticParams` is
not used correctly.
# How?
Modified the condition checks around the use of `generateStaticParams`
to include a check for an empty array and added a corresponding error
message.
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Co-authored-by: Steven <steven@ceriously.com>