Use Plugins DSL in Kotlin Gradle scripts

When plugins DSL is used, there is no need to
manually generate typesafe accessors for extensions and
conventions (by running `./gradlew kotlinDslAccessorsSnapshot`).

libraries/tools/kotlin-annotation-processing/build.gradle.kts

@@ -4,7 +4,9 @@ import org.gradle.jvm.tasks.Jar
 
 description = "Annotation Processor wrapper for Kotlin"
 
-apply { plugin("kotlin") }
+plugins {
+    kotlin("jvm")
+}
 
 val packedJars by configurations.creating
 

libraries/tools/kotlin-annotations-android/build.gradle.kts

@@ -2,7 +2,9 @@ import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
 description = "Kotlin annotations for Android"
 
-apply { plugin("kotlin") }
+plugins {
+    kotlin("jvm")
+}
 
 jvmTarget = "1.6"
 javaHome = rootProject.extra["JDK_16"] as String

libraries/tools/kotlin-script-util/build.gradle.kts

@@ -1,8 +1,10 @@
 
 description = "Kotlin scripting support utilities"
 
-apply { plugin("kotlin") }
-apply { plugin("jps-compatible") }
+plugins {
+    kotlin("jvm")
+    id("jps-compatible")
+}
 
 dependencies {
     compile(project(":kotlin-stdlib"))