Build: Centralize build logic for kotlin-plugin in :prepare:idea-plugin

plugins/sam-with-receiver/sam-with-receiver-cli/build.gradle.kts

@@ -25,7 +25,7 @@ sourceSets {
 
 publish()
 
-val jar = runtimeJar {}
+runtimeJar()
 sourcesJar()
 javadocJar()
 testsJar {}
@@ -34,10 +34,6 @@ dist {
     rename("kotlin-", "")
 }
 
-ideaPlugin {
-    from(jar)
-}
-
 projectTest {
     dependsOn(":kotlin-stdlib:jvm-minimal-for-test:dist")
     workingDir = rootDir

plugins/scripting/scripting-impl/build.gradle.kts

@@ -35,14 +35,12 @@ tasks.withType<org.jetbrains.kotlin.gradle.dsl.KotlinCompile<*>> {
 
 publish()
 
-val jar = runtimeJar {}
+runtimeJar()
 sourcesJar()
 javadocJar()
 
 dist()
 
-ideaPlugin()
-
 projectTest {
     workingDir = rootDir
 }