splitting and ordering api tests into multiple files

Author: Jolanrensen

kotlin-spark-api/3.2/src/test/kotlin/org/jetbrains/kotlinx/spark/api/DatasetFunctionTests.kt renamed to kotlin-spark-api/3.2/src/test/kotlin/org/jetbrains/kotlinx/spark/api/DatasetFunctionTest.kt

@@ -16,7 +16,7 @@ import scala.Tuple2
 import scala.Tuple3
 import java.io.Serializable
 
-class DatasetFunctionTests : ShouldSpec({
+class DatasetFunctionTest : ShouldSpec({
 
     context("dataset extensions") {
         withSpark(props = mapOf("spark.sql.codegen.comments" to true)) {

kotlin-spark-api/3.2/src/test/kotlin/org/jetbrains/kotlinx/spark/api/EncodingTests.kt renamed to kotlin-spark-api/3.2/src/test/kotlin/org/jetbrains/kotlinx/spark/api/EncodingTest.kt

@@ -38,7 +38,7 @@ import java.time.Instant
 import java.time.LocalDate
 import java.time.Period
 
-class EncodingTests : ShouldSpec({
+class EncodingTest : ShouldSpec({
 
     context("encoders") {
         withSpark(props = mapOf("spark.sql.codegen.comments" to true)) {