Fix 'kotlin-compiler-embeddable' project does not publish required artifacts

Restore publishing javadocs and sources jars.

prepare/compiler-embeddable/build.gradle.kts

@@ -52,24 +52,24 @@ val runtimeJar = runtimeJar(embeddableCompiler()) {
     mergeServiceFiles()
 }
 
-publish {
+val sourcesJar = sourcesJar {
-    setArtifacts(listOf(runtimeJar))
-}
-
-sourcesJar {
     val compilerTask = project(":kotlin-compiler").tasks.named<Jar>("sourcesJar")
     dependsOn(compilerTask)
     val archiveOperations = serviceOf<ArchiveOperations>()
     from(compilerTask.map { it.archiveFile }.map { archiveOperations.zipTree(it) })
 }
 
-javadocJar {
+val javadocJar = javadocJar {
     val compilerTask = project(":kotlin-compiler").tasks.named<Jar>("javadocJar")
     dependsOn(compilerTask)
     val archiveOperations = serviceOf<ArchiveOperations>()
     from(compilerTask.map { it.archiveFile }.map { archiveOperations.zipTree(it) })
 }
 
+publish {
+    setArtifacts(listOf(runtimeJar, sourcesJar, javadocJar))
+}
+
 projectTest {
     dependsOn(runtimeJar)
     val testCompilerClasspathProvider = project.provider { testCompilerClasspath.asPath }