[LL FIR] KT-57455 Avoid creating optional annotation class providers

- An `OptionalAnnotationClassesProvider` only needs to be created if the
  package part provider may even have optional annotation classes.
- In the IDE case, the package part provider never provides optional
  annotation classes, so especially in the IDE, we can avoid a lot of
  useless symbol providers with this.

core/descriptors.jvm/src/org/jetbrains/kotlin/load/kotlin/JvmPackagePartProviderBase.kt

@@ -66,6 +66,11 @@ abstract class JvmPackagePartProviderBase<MappingsKey> : PackageAndMetadataPartP
             getAllOptionalAnnotationClasses(module.mapping)
         }
 
+    override fun mayHaveOptionalAnnotationClasses(): Boolean {
+        // `loadedModules` is mutable, so even a package part provider without optional annotation classes may have some in the future.
+        return true
+    }
+
     companion object {
         fun getAllOptionalAnnotationClasses(module: ModuleMapping): List<ClassData> {
             val data = module.moduleData

core/deserialization.common.jvm/src/org/jetbrains/kotlin/load/kotlin/PackagePartProvider.kt

@@ -28,6 +28,11 @@ interface PackagePartProvider {
 
     fun getAllOptionalAnnotationClasses(): List<ClassData>
 
+    /**
+     * Returns `true` if [getAllOptionalAnnotationClasses] may return a non-empty list.
+     */
+    fun mayHaveOptionalAnnotationClasses(): Boolean
+
     object Empty : PackagePartProvider {
         override fun findPackageParts(packageFqName: String): List<String> = emptyList()
 
@@ -35,6 +40,8 @@ interface PackagePartProvider {
 
         override fun getAllOptionalAnnotationClasses(): List<ClassData> = emptyList()
 
+        override fun mayHaveOptionalAnnotationClasses(): Boolean = false
+
         override fun computePackageSetWithNonClassDeclarations(): Set<String> = emptySet()
     }
 }