Embedded WASI: fix InitializeWithCopy VWT type mismatch

Fixes Embedded Swift concurrency tests that crash with this stack trace:

```
Error: Trap: indirect call type mismatch, expected FunctionType(parameters: [WasmTypes.ValueType.i32, WasmTypes.ValueType.i32], results: []), got FunctionType(parameters: [W
asmTypes.ValueType.i32, WasmTypes.ValueType.i32, WasmTypes.ValueType.i32], results: [WasmTypes.ValueType.i32])
    0: swift::AsyncTask::completeFuture(swift::AsyncContext*)
    1: completeTaskAndRelease(swift::AsyncContext*, swift::SwiftError*)
    2: completeTaskWithClosure(swift::AsyncContext*, swift::SwiftError*)
    3: $exIeAgHr_xs5Error_pIegHrzo_s8SendableRzs5NeverORs_r0_lTRyt_Tg5TATQ0_
    4: $exIeAgHr_xs5Error_pIegHrzo_s8SendableRzs5NeverORs_r0_lTRyt_Tg5TQ0_
    5: $e1a4MainV4mainyyYaFZyyYacfU_TATQ0_
    6: $e1a4MainV4mainyyYaFZyyYacfU_TY1_
    7: swift_task_switch
    8: $e1a4MainV4mainyyYaFZyyYacfU_TQ0_
    9: $e1a4testSiyYaFTY0_
    10: swift::runJobInEstablishedExecutorContext(swift::Job*)
    11: swift_job_run
    12: $es19CooperativeExecutorC8runUntilyySbyXEKF
    13: $es19CooperativeExecutorCs07RunLoopB0ssACP3runyyKFTW
    14: swift_task_asyncMainDrainQueueImpl
    15: swift_task_asyncMainDrainQueue
    16: main
    17: __main_void
    18: _start
    19: unknown
```

Author: MaxDesiatov

include/swift/ABI/Task.h

@@ -241,7 +241,7 @@ struct ResultTypeInfo {
 #else
   size_t size = 0;
   size_t alignMask = 0;
-  void (*initializeWithCopy)(OpaqueValue *result, OpaqueValue *src) = nullptr;
+  OpaqueValue * (*initializeWithCopy)(OpaqueValue *result, OpaqueValue *src, void *type) = nullptr;
   void (*storeEnumTagSinglePayload)(OpaqueValue *v, unsigned whichCase,
                                     unsigned emptyCases) = nullptr;
   void (*destroy)(OpaqueValue *, void *) = nullptr;
@@ -256,7 +256,7 @@ struct ResultTypeInfo {
     return alignMask + 1;
   }
   void vw_initializeWithCopy(OpaqueValue *result, OpaqueValue *src) {
-    initializeWithCopy(result, src);
+    initializeWithCopy(result, src, nullptr);
   }
   void vw_storeEnumTagSinglePayload(OpaqueValue *v, unsigned whichCase,
                                     unsigned emptyCases) {

include/swift/ABI/TaskOptions.h

@@ -215,9 +215,9 @@ class ResultTypeInfoTaskOptionRecord : public TaskOptionRecord {
   size_t size;
   size_t alignMask;
 
-  void (*__ptrauth_swift_value_witness_function_pointer(
+  OpaqueValue *(*__ptrauth_swift_value_witness_function_pointer(
       SpecialPointerAuthDiscriminators::InitializeWithCopy)
-            initializeWithCopy)(OpaqueValue *, OpaqueValue *);
+            initializeWithCopy)(OpaqueValue *, OpaqueValue *, void *);
 
   void (*__ptrauth_swift_value_witness_function_pointer(
       SpecialPointerAuthDiscriminators::StoreEnumTagSinglePayload)

test/embedded/concurrency-async-let.swift

@@ -1,12 +1,12 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -enable-experimental-feature Embedded -parse-as-library %s -c -o %t/a.o
-// RUN: %target-clang %t/a.o -o %t/a.out -L%swift_obj_root/lib/swift/embedded/%target-cpu-apple-macos -lswift_Concurrency -lswift_ConcurrencyDefaultExecutor -dead_strip
+// RUN: %target-clang %t/a.o -o %t/a.out -L%swift_obj_root/lib/swift/embedded/%module-target-triple %target-clang-resource-dir-opt -lswift_Concurrency %target-swift-default-executor-opt -dead_strip
 // RUN: %target-run %t/a.out | %FileCheck %s
 
 // REQUIRES: executable_test
 // REQUIRES: swift_in_compiler
 // REQUIRES: optimized_stdlib
-// REQUIRES: OS=macosx
+// REQUIRES: OS=macosx || OS=wasip1
 // REQUIRES: swift_feature_Embedded
 
 import _Concurrency