onnxruntime

fix webgpu delay load test (#23157)

### Description

This change fixes the WebGPU delay load test.


<details>
<summary>Fix UB in macro</summary>

The following C++ code outputs `2, 1` in MSVC, while it outputs `1, 1`
in GCC:

```c++
#include <iostream>

#define A 1
#define B 1

#define ENABLE defined(A) && defined(B)

#if ENABLE
int x = 1;
#else
int x = 2;
#endif

#if defined(A) && defined(B)
int y = 1;
#else
int y = 2;
#endif

int main()
{
    std::cout << x << ", " << y << "\n";
}
```

Clang reports `macro expansion producing 'defined' has undefined
behavior [-Wexpansion-to-defined]`.

</details>

<details>
<summary>Fix condition of build option
onnxruntime_ENABLE_DELAY_LOADING_WIN_DLLS</summary>

Delay load is explicitly disabled when python binding is being built.
modifies the condition.

</details>