Extract logic of builtins package fragment provider creation

This allows to drop the compile dependency of module 'descriptors' on
'deserialization', breaking the circular dependency between them

libraries/tools/kotlin-reflect/build.gradle

@@ -91,6 +91,9 @@ task reflectShadowJar(type: ShadowJar) {
     from ("${core}/descriptor.loader.java/src") {
         include 'META-INF/services/**'
     }
+    from ("${core}/deserialization/src") {
+        include 'META-INF/services/**'
+    }
 
     configurations = [project.configurations.shadows]
     relocate 'org.jetbrains.kotlin', 'kotlin.reflect.jvm.internal.impl'