### Godot version

v4.1.dev.custom_build [2e273f0e35800f2bcc7c05db54100caa97928f69]

### System information

Windows 11 x64, Vulkan (Forward+), NVIDIA GeForce GTX 1650

### Issue description

Importing EXR files from baking lightmaps will always fail. But the files aren't corrupted and can be opened in other software like Krita.

### Steps to reproduce

Do these in the MRP

1. Find `lm` node in the scene `000.tscn`, And press `Bake Lightmaps`
2. After finished baking, The lightmaps should be rendering normally and several error messages will be printed out. They say :
- Invalid/Corrupted data found when decoding pixels.
- Error loading image: res://000.exr
- Error importing 'res://000.exr'.

3. When trying to reopen `000.tscn`, The lightmaps won't render in the scene anymore.

( Optional )

4. If trying to put the lightmap data `000.lmbake` into the `lm` node. It will spam these out :
- Uniforms were never supplied for set (1) at the time of drawing, which are required by the pipeline
- Texture (binding: 7) is an array of (8) textures, so it should be provided equal number of texture IDs to satisfy it (IDs provided: 7).

Then all the meshes go black immediately.

### Minimal reproduction project

[i_5222a99f5_001.zip](https://github.com/godotengine/godot/files/11629095/i_5222a99f5_001.zip)

malloc(sizeof(int) * static_cast<size_t>(exr_header->num_channels)));
  for (size_t c = 0; c < static_cast<size_t>(exr_header->num_channels); c++) {
    exr_header->requested_pixel_types[c] = info.channels[c].pixel_type;
  }
  exr_header->num_custom_attributes = static_cast<int>(info.attributes.size());
  if (exr_header->num_custom_attributes > 0) {
    
    
    if (exr_header->num_custom_attributes > TINYEXR_MAX_CUSTOM_ATTRIBUTES) {
      exr_header->num_custom_attributes = TINYEXR_MAX_CUSTOM_ATTRIBUTES;
    }
    exr_header->custom_attributes = static_cast<EXRAttribute *>(malloc(
        sizeof(EXRAttribute) * size_t(exr_header->num_custom_attributes)));
    for (size_t i = 0; i < size_t(exr_header->num_custom_attributes); i++) {
      memcpy(exr_header->custom_attributes[i].name, info.attributes[i].name,
             256);
      memcpy(exr_header->custom_attributes[i].type, info.attributes[i].type,
             256);
      exr_header->custom_attributes[i].size = info.attributes[i].size;
      
      exr_header->custom_attributes[i].value = info.attributes[i].value;
    }
  } else {
    exr_header->custom_attributes = NULL;
  }
  exr_header->header_len = info.header_len;
  return true;
}
struct OffsetData {
  OffsetData() : num_x_levels(0), num_y_levels(0) {}