[SEDONA-688] Verify KNN parameter K must be equal or larger than 1

[zhangfengcdt]

Did you read the Contributor Guide?

• Yes, I have read the Contributor Rules and Contributor Development Guide

Is this PR related to a JIRA ticket?

• Yes, the URL of the associated JIRA ticket is https://issues.apache.org/jira/browse/SEDONA-XXX. The PR name follows the format [SEDONA-XXX] my subject.

What changes were proposed in this PR?

This PR add additional verification to the KNN join queries to make sure that the number of neighbors (k) must be equal or greater than 1. This is to fix the bug reported in SEDONA-688.

How was this patch tested?

The following unit test is added:
KnnJoinSuite::it("KNN Join should verify the correct parameter k is passed to the join function")

Did this PR include necessary documentation updates?

• No, this PR does not affect any public API so no need to change the documentation.