[FIR] Add fir node for raw contract description

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

@@ -221,6 +221,8 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
         builder(propertyAccessor) {
             parents += functionBuilder
             defaultNull("body")
+            default("contractDescription", "FirEmptyContractDescription")
+            useTypes(emptyContractDescriptionType)
         }
 
         builder(whenExpression) {
@@ -255,6 +257,8 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
             parents += functionBuilder
             parents += typeParametersOwnerBuilder
             defaultNull("body")
+            default("contractDescription", "FirEmptyContractDescription")
+            useTypes(emptyContractDescriptionType)
             openBuilder()
         }
 

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

@@ -144,4 +144,6 @@ object FirTreeBuilder : AbstractFirTreeBuilder() {
     val composedSuperTypeRef = element("ComposedSuperTypeRef", TypeRef, typeRef)
 
     val contractDescription = element("ContractDescription", Contracts)
+    val rawContractDescription = element("RawContractDescription", Contracts, contractDescription)
+    val resolvedContractDescription = element("ResolvedContractDescription", Contracts, contractDescription)
 }

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

@@ -294,8 +294,7 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
                 value = "!isGetter"
                 withGetter = true
             }
-            default("contractDescription", "FirEmptyContractDescription")
-            useTypes(modalityType, emptyContractDescriptionType)
+            useTypes(modalityType)
             kind = OpenClass
         }
 
@@ -447,8 +446,6 @@ object ImplementationConfigurator : AbstractFirTreeImplementationConfigurator()
 
         impl(simpleFunction) {
             kind = OpenClass
-            default("contractDescription", "FirEmptyContractDescription")
-            useTypes(emptyContractDescriptionType)
         }
 
         impl(delegatedTypeRef) {

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

@@ -576,7 +576,11 @@ object NodeConfigurator : AbstractFieldConfigurator<FirTreeBuilder>(FirTreeBuild
             +field(varianceType)
         }
 
-        contractDescription.configure {
+        rawContractDescription.configure {
+            +field("contractCall", functionCall)
+        }
+
+        resolvedContractDescription.configure {
             +fieldList("effects", effectDeclarationType)
         }
     }