fix: exclude SkipToken from infinite query getOptions queryFn type

[LudvigHz]

Problem

getOptions (and therefore getFetchOptions) already excludes SkipToken from the returned queryFn type for regular queries:

queryFn?: Exclude<UseQueryOptions<TFnData, TError, TFnData, QueryKey>['queryFn'], SkipToken>

but the infinite query branch does not. Since @tanstack/react-query v5.62, the suspense hooks reject skipToken in queryFn (UseSuspenseInfiniteQueryOptions omits it), so this fails to typecheck:

useSuspenseInfiniteQuery(myInfiniteQuery.getFetchOptions(variables))
// Type 'typeof skipToken' is not assignable to type 'QueryFunction<...>'

Fix

Apply the same Exclude<..., SkipToken> to the infinite branch of getOptions, mirroring the regular-query branch. Types-only change; tsc -b and the jest suite pass.

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