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`).

prepare/android-extensions-compiler-gradle/build.gradle.kts

@@ -3,7 +3,9 @@ import org.gradle.jvm.tasks.Jar
 
 description = "Kotlin Android Extensions Compiler"
 
-apply { plugin("kotlin") }
+plugins {
+    kotlin("jvm")
+}
 
 dependencies {
     compileOnly(project(":compiler:util"))

prepare/android-lint/build.gradle.kts

@@ -1,7 +1,9 @@
 
 description = "Kotlin Android Lint"
 
-apply { plugin("java-base") }
+plugins {
+    `java-base`
+}
 
 val projectsToShadow = listOf(
         ":plugins:lint",

prepare/compiler-client-embeddable/build.gradle.kts

@@ -4,10 +4,9 @@ description = "Kotlin compiler client embeddable"
 
 plugins {
     maven
+    kotlin("jvm")
 }
 
-apply { plugin("kotlin") }
-
 val jarContents by configurations.creating
 val testRuntimeCompilerJar by configurations.creating
 val testStdlibJar by configurations.creating

prepare/formatter/build.gradle.kts

@@ -1,7 +1,9 @@
 
 description = "Kotlin Formatter"
 
-apply { plugin("java") }
+plugins {
+    java
+}
 
 runtimeJar {
     archiveName = "kotlin-formatter.jar"

prepare/ide-lazy-resolver/build.gradle.kts

@@ -2,7 +2,9 @@ import java.util.Properties
 
 description = "Kotlin IDE Lazy Resolver"
 
-apply { plugin("java") }
+plugins {
+    java
+}
 
 val versions by configurations.creating
 val versionFilePath = "$rootDir/dependencies/dependencies.properties"