Setup dist task to assemble libs for compiler distribution.

Produce special stdlib artifact with annotations for dist.
Put js outputs to dist, they're required for JS backend tests.

Use kotlin-compiler for maven, which has all required dependencies bundled.
Clean local directory repository on clean.

Change paths in tests to compiled artifacts.

libraries/stdlib/jre7/build.gradle

@@ -35,6 +35,10 @@ artifacts {
     archives javadocJar
 }
 
+dist {
+    from (jar, sourcesJar)
+}
+
 
 tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile) {
     kotlinOptions.jdkHome = JDK_17