clang-cl behaves different on attributes than MSVC

When using the attribute `[[nodiscard]]` after `__declspec(dllexport)`, the compiler complains:
```
(5,25): error: 'nodiscard' attribute cannot be applied to types
```
When swapping the `[[nodiscard]]` and `__declspec(dllexport)`, the compilation succeeds.

This behavior is different from MSVC, as MSVC does not care about the order of the arguments.

Tested with

- clang-cl 20.1.8 on Ubuntu
- clang-cl 18.1.0 [Godbolt](https://godbolt.org/z/4cYYW938r)
- MSVC v19.20 [Godbolt](https://godbolt.org/z/ra8h57Eqa)

Complete example:

```
enum bar {
bar1 = 0
};

__declspec(dllexport) [[nodiscard]] bar foo() {
return bar::bar1;
}

int main() {
foo();
return 0;
}
```

Start by compiling the complete example with clang-cl using both attribute orders, then compare the diagnostics with MSVC and the linked Godbolt examples. Trace clang-cl's handling of __declspec(dllexport) and [[nodiscard]] placement; done means the accepted behavior matches MSVC for either order without misapplying nodiscard to a type.

Written by the indexing model from the issue text.