Build: Rework runtimeJar helper and drop redundant configuration

#KTI-559

kotlin-native/gradle/kotlinGradlePlugin.gradle

@@ -13,12 +13,13 @@ project.buildscript.repositories {
 project.buildscript.dependencies {
     classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:${project.bootstrapKotlinVersion}"
 }
+
 configurations {
     kotlinCompilerClasspath
 }
 
 if (!(project.findProperty("withoutEmbedabble")?.toString()?.toBoolean() ?: false)) {
     project.dependencies {
-        kotlinCompilerClasspath(project(path: ":kotlin-compiler-embeddable", configuration: "runtimeJar"))
+        kotlinCompilerClasspath(project(":kotlin-compiler-embeddable"))
     }
 }