Build: Fix up-to-date for :kotlin-compiler-client-embeddable:shadowJar

The task was never up-to-date because default jar and shadowJar tasks overwritten each other's output

 #KT-28656 Fixed

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

@@ -49,17 +49,12 @@ projectTest {
     }
 }
 
-archives.artifacts.let { artifacts ->
+noDefaultJar()
-    artifacts.forEach {
-        if (it.type == "jar") {
-            artifacts.remove(it)
-        }
-    }
-}
 
 runtimeJar(task<ShadowJar>("shadowJar")) {
     from(jarContents)
 }
+
 sourcesJar()
 javadocJar()