JPS Build: rename packedJars property to embedded, get rid of ShadowJar

Configuration should have name "embedded" for IDEA import.
ShadowJar doesn't required anymore as it is already embedded in
 default jar task.

libraries/scripting/jvm-host-embeddable/build.gradle.kts

@@ -1,13 +1,9 @@
-
-import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
 import org.gradle.jvm.tasks.Jar
 
 description = "Kotlin Scripting JVM host (for using with embeddable compiler)"
 
 plugins { java }
 
-val embedded by configurations.creating
-
 dependencies {
     embedded(project(":kotlin-scripting-jvm-host")) { isTransitive = false }
     runtime(project(":kotlin-script-runtime"))
@@ -26,12 +22,7 @@ sourceSets {
 
 publish()
 
-noDefaultJar()
-
-runtimeJar(rewriteDepsToShadedCompiler(
-        task<ShadowJar>("shadowJar")  {
-            from(embedded)
-        }
-))
+val jar = tasks.getByName<Jar>("jar")
+runtimeJar(rewriteDepsToShadedCompiler(jar))
 sourcesJar()
 javadocJar()