### 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)

size_t ret = fread(&buf[0], 1, tinyexr::kEXRVersionSize, fp);
  fclose(fp);
  if (ret != tinyexr::kEXRVersionSize) {
    return TINYEXR_ERROR_INVALID_FILE;
  }
  return ParseEXRVersionFromMemory(version, buf, tinyexr::kEXRVersionSize);
}
int LoadEXRMultipartImageFromMemory(EXRImage *exr_images,
                                    const EXRHeader **exr_headers,
                                    unsigned int num_parts,
                                    const unsigned char *memory,
                                    const size_t size, const char **err) {
  if (exr_images == NULL || exr_headers == NULL || num_parts == 0 ||
      memory == NULL || (size <= tinyexr::kEXRVersionSize)) {
    tinyexr::SetErrorMessage(
        "Invalid argument for LoadEXRMultipartImageFromMemory()", err);
    return TINYEXR_ERROR_INVALID_ARGUMENT;
  }
  
  size_t total_header_size = 0;
  for (unsigned int i = 0; i < num_parts; i++) {
    if (exr_headers[i]->header_len == 0) {
      tinyexr::SetErrorMessage("EXRHeader variable is not initialized.", err);
      return TINYEXR_ERROR_INVALID_ARGUMENT;
    }
    total_header_size += exr_headers[i]->header_len;
  }
  const char *marker = reinterpret_cast<const char *>(
      memory + total_header_size + 4 +
      4);