Checkout closes request for different item of the same instance

Preconditions:

1. TLR feature is enabled
2. Instance with at least two items exists

Steps to Reproduce:

1. Create a title level page request for the instance
2. Note which item the request was created for, then checkout the second item to a different user

Expected Results: Item is checked out successfully, status of the request does not changed
Actual Results: Item is checked out successfully, but the request is closed even though it was created for a different item

Hint for developer: we need to find the not just the first fulfillable request in the queue, but the one that is fulfillable by the item that we are trying to checkout.

See https://github.com/folio-org/mod-circulation/blob/a5dc3018b52eddf636a90c7fb08bed83d30eb78d/src/main/java/org/folio/circulation/domain/UpdateRequestQueue.java#L178