Switch from `<Python.h>` to `"Python.h"` to fix MSVC bug
Switch from `<Python.h>` to `"Python.h"` to fix MSVC bug

Should probably fix the

```
error C2039: 'copysign': is not a member of '`global namespace''
```

error we're seeing? Testing with one file before doing a larger change.

PiperOrigin-RevId: 427246946
Change-Id: Iae9100cd9a43bb5ecff90008a35a331f3a94c94e

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