Build: migrate to Kotlin 2.1.0

gradle.properties

@@ -8,7 +8,7 @@ riderPluginId=com.jetbrains.rider.plugins.efcore
 pluginVersion=999.0.0-local
 
 rdVersion=2024.3-pre2
-rdKotlinVersion=1.9.23
+rdKotlinVersion=2.1.0
 intellijPlatformGradlePluginVersion=2.0.0-beta8
 gradleJvmWrapperVersion=0.14.0
 
@@ -26,6 +26,3 @@ productVersion=2025.1-SNAPSHOT
 # Kotlin 1.4 will bundle the stdlib dependency by default, causing problems with the version bundled with the IDE
 # https://blog.jetbrains.com/kotlin/2020/07/kotlin-1-4-rc-released/#stdlib-default
 kotlin.stdlib.default.dependency=false
-
-# Fix for Kotlin 1.8.20 uses a new incremental compilation approach that can't handle large JAR files, resulting in an OutOfMemory exception in the compileKotlin task.
-kotlin.incremental.useClasspathSnapshot=false