[IR] Don't use the GET_PROPERTY origin on IrGetField expressions.

This origin was set somewhat arbitrarily.
It actually only makes sense for `IrCall`s to property getters.
There were no places in lowerings that checked `IrGetField` expressions
for this origin value.

^KT-62500 Fixed

plugins/atomicfu/atomicfu-compiler/src/org/jetbrains/kotlinx/atomicfu/compiler/backend/js/TransformerUtil.kt

@@ -74,8 +74,7 @@ internal fun IrPluginContext.buildSetField(
         receiver,
         value,
         irBuiltIns.unitType,
-        IrStatementOrigin.GET_PROPERTY,
-        superQualifierSymbol
+        superQualifierSymbol = superQualifierSymbol
     )
 
 internal fun buildGetField(
@@ -90,8 +89,7 @@ internal fun buildGetField(
         symbol,
         type ?: symbol.owner.type,
         receiver,
-        IrStatementOrigin.GET_PROPERTY,
-        superQualifierSymbol
+        superQualifierSymbol = superQualifierSymbol
     )
 
 internal fun buildSimpleType(