Support new scheme of compilation of OptionalExpectation annotations

Instead of generating these annotation classes as package-private on
JVM, serialize their metadata to the .kotlin_module file, and load it
when compiling dependent multiplatform modules.

The problem with generating them as package-private was that
kotlin-stdlib for JVM would end up declaring symbols from other
platforms, which would include some annotations from package
kotlin.native. But using that package is discouraged by some tools
because it has a Java keyword in its name. In particular, jlink refused
to work with such artifact altogether (KT-21266).

 #KT-38652 Fixed

idea/idea-analysis/src/org/jetbrains/kotlin/idea/caches/resolve/IDEPackagePartProvider.kt

@@ -23,6 +23,7 @@ import org.jetbrains.kotlin.idea.vfilefinder.KotlinModuleMappingIndex
 import org.jetbrains.kotlin.load.kotlin.PackagePartProvider
 import org.jetbrains.kotlin.metadata.jvm.deserialization.PackageParts
 import org.jetbrains.kotlin.name.ClassId
+import org.jetbrains.kotlin.serialization.deserialization.ClassData
 import org.jetbrains.kotlin.serialization.deserialization.MetadataPartProvider
 
 class IDEPackagePartProvider(val scope: GlobalSearchScope) : PackagePartProvider, MetadataPartProvider {
@@ -38,4 +39,10 @@ class IDEPackagePartProvider(val scope: GlobalSearchScope) : PackagePartProvider
     // Note that in case of several modules with the same name, we return all annotations on all of them, which is probably incorrect
     override fun getAnnotationsOnBinaryModule(moduleName: String): List<ClassId> =
         FileBasedIndex.getInstance().getValues(KotlinJvmModuleAnnotationsIndex.KEY, moduleName, scope).flatten()
+
+    // Optional annotations are not needed in IDE because they can only be used in common module sources, and they are loaded via the
+    // standard common module resolution there. (In the CLI compiler the situation is different because we compile common+platform
+    // sources together, _without_ common dependencies.)
+    override fun getAllOptionalAnnotationClasses(): List<ClassData> =
+        emptyList()
 }