[FIR] Introduce new FIR node for SAM conversion

#KT-62847

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

@@ -416,6 +416,10 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
 
         noBuilder(constExpression)
 
+        builder(samConversionExpression) {
+            withCopy()
+        }
+
         // -----------------------------------------------------------------------
 
         findImplementationsWithElementInParents(annotationContainer).forEach {

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

@@ -149,6 +149,7 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
     val spreadArgumentExpression by element(Expression, wrappedArgumentExpression)
     val namedArgumentExpression by element(Expression, wrappedArgumentExpression)
     val varargArgumentsExpression by element(Expression, expression)
+    val samConversionExpression by element(Expression, expression)
 
     val resolvedQualifier by element(Expression, expression)
     val errorResolvedQualifier by element(Expression, resolvedQualifier, diagnosticHolder)

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

@@ -615,6 +615,10 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
             +field("varargElementType", typeRef)
         }
 
+        samConversionExpression.configure {
+            +field("expression", expression)
+        }
+
         resolvedQualifier.configure {
             +field("packageFqName", fqNameType)
             +field("relativeClassFqName", fqNameType, nullable = true)