[IR] Rename IrAnnotationsFromPluginRegistrar to IrGeneratedDeclarationsRegistrar

In further commits, this service will be used not only for registering
  annotations, but newly generated IR declarations too

compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/FirAdditionalMetadataProvider.kt

@@ -8,7 +8,7 @@ package org.jetbrains.kotlin.fir.serialization
 import org.jetbrains.kotlin.fir.declarations.FirDeclaration
 import org.jetbrains.kotlin.fir.expressions.FirAnnotation
 
-abstract class FirAdditionalMetadataAnnotationsProvider {
+abstract class FirAdditionalMetadataProvider {
     abstract fun findGeneratedAnnotationsFor(declaration: FirDeclaration): List<FirAnnotation>
     abstract fun hasGeneratedAnnotationsFor(declaration: FirDeclaration): Boolean
 }

compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/FirKLibSerializerExtension.kt

@@ -30,7 +30,7 @@ class FirKLibSerializerExtension(
     override val constValueProvider: ConstValueProvider?,
     private val allowErrorTypes: Boolean,
     private val exportKDoc: Boolean,
-    override val additionalAnnotationsProvider: FirAdditionalMetadataAnnotationsProvider?
+    override val additionalMetadataProvider: FirAdditionalMetadataProvider?
 ) : FirSerializerExtensionBase(KlibMetadataSerializerProtocol) {
     override fun shouldUseTypeTable(): Boolean = true
 

compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/FirSerializerExtension.kt

@@ -27,7 +27,7 @@ abstract class FirSerializerExtension {
     val annotationSerializer by lazy { FirAnnotationSerializer(session, stringTable, constValueProvider) }
 
     protected abstract val constValueProvider: ConstValueProvider?
-    protected abstract val additionalAnnotationsProvider: FirAdditionalMetadataAnnotationsProvider?
+    protected abstract val additionalMetadataProvider: FirAdditionalMetadataProvider?
 
     @OptIn(ConstValueProviderInternals::class)
     internal inline fun <T> processFile(firFile: FirFile, crossinline action: () -> T): T {
@@ -107,12 +107,12 @@ abstract class FirSerializerExtension {
     }
 
     fun hasAdditionalAnnotations(declaration: FirDeclaration): Boolean {
-        return additionalAnnotationsProvider?.hasGeneratedAnnotationsFor(declaration) ?: false
+        return additionalMetadataProvider?.hasGeneratedAnnotationsFor(declaration) ?: false
     }
 
     // TODO: add usages
     fun getAnnotationsGeneratedByPlugins(declaration: FirDeclaration): List<FirAnnotation> {
-        return additionalAnnotationsProvider?.findGeneratedAnnotationsFor(declaration) ?: emptyList()
+        return additionalMetadataProvider?.findGeneratedAnnotationsFor(declaration) ?: emptyList()
     }
 
     open fun serializeErrorType(type: ConeErrorType, builder: ProtoBuf.Type.Builder) {

compiler/fir/fir-serialization/src/org/jetbrains/kotlin/fir/serialization/FirSerializerExtensionBase.kt

@@ -152,7 +152,7 @@ abstract class FirSerializerExtensionBase(
 
     private fun FirAnnotationContainer.allRequiredAnnotations(session: FirSession): List<FirAnnotation> {
         val nonSourceAnnotations = nonSourceAnnotations(session)
-        val additionalMetadataAnnotationsProvider = additionalAnnotationsProvider
+        val additionalMetadataAnnotationsProvider = additionalMetadataProvider
         return if (this is FirDeclaration && additionalMetadataAnnotationsProvider != null) {
             nonSourceAnnotations + additionalMetadataAnnotationsProvider.findGeneratedAnnotationsFor(this)
         } else {