[FIR] Implement CANNOT_ALL_UNDER_IMPORT_FROM_SINGLETON diagnostic

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/FirTreeBuilder.kt

@@ -14,8 +14,7 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
     val typeRef = sealedElement("TypeRef", TypeRef, annotationContainer)
     val reference = element("Reference", Reference)
     val label = element("Label", Other)
-    val import = element("Import", Declaration)
-    val resolvedImport = element("ResolvedImport", Declaration, import)
+
     val symbolOwner = element("SymbolOwner", Other)
     val resolvable = sealedElement("Resolvable", Expression)
 
@@ -64,6 +63,10 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
 
     val diagnosticHolder = element("DiagnosticHolder", Diagnostics)
 
+    val import = element("Import", Declaration)
+    val resolvedImport = element("ResolvedImport", Declaration, import)
+    val errorImport = element("ErrorImport", Declaration, import, diagnosticHolder)
+
     val loop = sealedElement("Loop", Expression, statement, targetElement)
     val errorLoop = element("ErrorLoop", Expression, loop, diagnosticHolder)
     val doWhileLoop = element("DoWhileLoop", Expression, loop)

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/ImplementationConfigurator.kt

@@ -65,6 +65,10 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
             }
         }
 
+        impl(errorImport) {
+            delegateFields(listOf("aliasName", "importedFqName", "isAllUnder", "source"), "delegate")
+        }
+
         impl(annotationCall) {
             default("typeRef") {
                 value = "annotationTypeRef"

compiler/fir/tree/tree-generator/src/org/jetbrains/kotlin/fir/tree/generator/NodeConfigurator.kt

@@ -432,6 +432,10 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
             )
         }
 
+        errorImport.configure {
+            +field("delegate", import)
+        }
+
         annotationCall.configure {
             +field("useSiteTarget", annotationUseSiteTargetType, nullable = true)
             +field("annotationTypeRef", typeRef).withTransform()