re-enable Kotlin support for v2 DynamoDB

[musketyr]

if the project is enabled at the moment, we get

java.lang.NoClassDefFoundError: org/jetbrains/kotlin/gradle/dsl/KotlinCompile	
at io.micronaut.gradle.MicronautKotlinSupport.configureKotlin(MicronautKotlinSupport.java:79)	
at io.micronaut.gradle.MicronautKotlinSupport.lambda$whenKotlinSupportPresent$0(MicronautKotlinSupport.java:50)	
•••
Caused by: java.lang.ClassNotFoundException: org.jetbrains.kotlin.gradle.dsl.KotlinCompile	
at io.micronaut.gradle.MicronautKotlinSupport.configureKotlin(MicronautKotlinSupport.java:79)	
at io.micronaut.gradle.MicronautKotlinSupport.lambda$whenKotlinSupportPresent$0(MicronautKotlinSupport.java:50)	
at org.gradle.api.internal.plugins.DefaultPluginManager$2.execute(DefaultPluginManager.java:258)	
at org.gradle.api.internal.plugins.DefaultPluginManager$2.execute(DefaultPluginManager.java:255)	
at org.gradle.configuration.internal.DefaultUserCodeApplicationContext$CurrentApplication$1.execute(DefaultUserCodeApplicationContext.java:123)	
at org.gradle.api.internal.DefaultCollectionCallbackActionDecorator$BuildOperationEmittingAction$1.run(DefaultCollectionCallbackActionDecorator.java:110)	
at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29)