[FIR] Drop redundant FirIntegerOperatorCall and number of fir copy methods

compiler/fir/tree/gen/org/jetbrains/kotlin/fir/declarations/builder/FirAnonymousFunctionBuilder.kt

@@ -112,3 +112,33 @@ inline fun buildAnonymousFunction(init: FirAnonymousFunctionBuilder.() -> Unit):
     }
     return FirAnonymousFunctionBuilder().apply(init).build()
 }
+
+@OptIn(ExperimentalContracts::class)
+inline fun buildAnonymousFunctionCopy(original: FirAnonymousFunction, init: FirAnonymousFunctionBuilder.() -> Unit): FirAnonymousFunction {
+    contract {
+        callsInPlace(init, kotlin.contracts.InvocationKind.EXACTLY_ONCE)
+    }
+    val copyBuilder = FirAnonymousFunctionBuilder()
+    copyBuilder.source = original.source
+    copyBuilder.annotations.addAll(original.annotations)
+    copyBuilder.moduleData = original.moduleData
+    copyBuilder.origin = original.origin
+    copyBuilder.attributes = original.attributes.copy()
+    copyBuilder.returnTypeRef = original.returnTypeRef
+    copyBuilder.receiverTypeRef = original.receiverTypeRef
+    copyBuilder.deprecation = original.deprecation
+    copyBuilder.containerSource = original.containerSource
+    copyBuilder.dispatchReceiverType = original.dispatchReceiverType
+    copyBuilder.controlFlowGraphReference = original.controlFlowGraphReference
+    copyBuilder.valueParameters.addAll(original.valueParameters)
+    copyBuilder.body = original.body
+    copyBuilder.symbol = original.symbol
+    copyBuilder.label = original.label
+    copyBuilder.invocationKind = original.invocationKind
+    copyBuilder.inlineStatus = original.inlineStatus
+    copyBuilder.isLambda = original.isLambda
+    copyBuilder.hasExplicitParameterList = original.hasExplicitParameterList
+    copyBuilder.typeParameters.addAll(original.typeParameters)
+    copyBuilder.typeRef = original.typeRef
+    return copyBuilder.apply(init).build()
+}

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

@@ -233,6 +233,7 @@ object BuilderConfigurator : AbstractBuilderConfigurator<FirTreeBuilder>(FirTree
             parents += functionBuilder
             defaultNull("invocationKind", "label", "body", "controlFlowGraphReference")
             default("inlineStatus", "InlineStatus.Unknown")
+            withCopy()
         }
 
         builder(propertyAccessor) {