[K/N] Do not cast the result of atomicGet/atomicSet invocation from Boolean to Byte in VolatileFieldsLowering, because this cast is done by the property getter.

Merge-request: KT-MR-11347
Merged-by: Maria Sokolova <maria.sokolova@jetbrains.com>

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/VolatileFieldsLowering.kt

@@ -246,6 +246,9 @@ internal class VolatileFieldsLowering(val context: Context) : FileLoweringPass {
                         putValueArgument(index, expression.getValueArgument(index))
                     }
                 }.let {
+                    if (intrinsicType == IntrinsicType.ATOMIC_GET_FIELD || intrinsicType == IntrinsicType.ATOMIC_SET_FIELD) {
+                        return it
+                    }
                     if (backingField.requiresBooleanConversion()) {
                         for (arg in 0 until it.valueArgumentsCount) {
                             it.putValueArgument(arg, builder.irBoolToByte(it.getValueArgument(arg)!!))