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>
