[SEDONA-279] Sedona-Flink should not depend on Sedona-Spark modules

[jiayuasu]

Did you read the Contributor Guide?

• Yes, I have read 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-279. The PR name follows the format [SEDONA-279] my subject.

What changes were proposed in this PR?

1. Move all serializer stuff to sedona-common
2. Delete the scala implementation of GeoHashDecoder since we already have a Java one
3. Remove all unneeded sedona-core/sedona-sql dependencies in sedona-flink
4. Move circle test to sedona-common since the circle is already in sedona-common
5. Move indexserde test to sedona-common since indexserde has been moved to sedona-common

How was this patch tested?

Passed CI

Did this PR include necessary documentation updates?

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