[IR] Make contextReceiverParametersCount abstract in IrFunction

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/lazy/Fir2IrLazyConstructor.kt

@@ -97,6 +97,8 @@ class Fir2IrLazyConstructor(
             error("Mutating Fir2Ir lazy elements is not possible")
         }
 
+    override var contextReceiverParametersCount: Int = 0
+
     override var valueParameters: List<IrValueParameter> by lazyVar(lock) {
         declarationStorage.enterScope(this)
         fir.valueParameters.mapIndexed { index, valueParameter ->

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/lazy/Fir2IrLazyPropertyAccessor.kt

@@ -73,6 +73,8 @@ class Fir2IrLazyPropertyAccessor(
         }
     }
 
+    override var contextReceiverParametersCount: Int = 0
+
     override var valueParameters: List<IrValueParameter> by lazyVar(lock) {
         if (!isSetter) emptyList()
         else {

compiler/fir/fir2ir/src/org/jetbrains/kotlin/fir/lazy/Fir2IrLazySimpleFunction.kt

@@ -61,6 +61,8 @@ class Fir2IrLazySimpleFunction(
         }
     }
 
+    override var contextReceiverParametersCount: Int = 0
+
     override var valueParameters: List<IrValueParameter> by lazyVar(lock) {
         declarationStorage.enterScope(this)
         fir.valueParameters.mapIndexed { index, valueParameter ->