stdlib: use the destructor CC adjustment thunk
Use the wrapper for the CC adjustment as on Windows x86, the destructor
needs to be `__stdcall`. This would fail otherwise with the following:
```
D:\a\1\s\swift\stdlib\public\stubs\ThreadLocalStorage.cpp(86,18): error: no matching function for call to '_stdlib_thread_key_create'
int result = SWIFT_THREAD_KEY_CREATE(&key, [](void *pointer) {
^~~~~~~~~~~~~~~~~~~~~~~
D:\a\1\s\swift\stdlib\public\stubs/../runtime/ThreadLocalStorage.h(96,35): note: expanded from macro 'SWIFT_THREAD_KEY_CREATE'
^~~~~~~~~~~~~~~~~~~~~~~~~
D:\a\1\s\swift\include\swift/Basic/Lazy.h(42,27): note: expanded from macro 'SWIFT_ONCE_F'
::std::call_once(TOKEN, FUNC, CONTEXT)
^~~~
D:\a\1\s\swift\stdlib\public\stubs\ThreadLocalStorage.cpp(43,1): note: candidate function not viable: no known conversion from '(lambda at D:\a\1\s\swift\stdlib\public\stubs\ThreadLocalStorage.cpp:85:3)' to '__swift_thread_key_destructor _Nullable' (aka 'void (*)(void *) __attribute__((stdcall))') for 2nd argument
_stdlib_thread_key_create(__swift_thread_key_t * _Nonnull key,
^
```
