### 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)

unsigned char bitmap[BITMAP_SIZE],
                           unsigned short &minNonZero,
                           unsigned short &maxNonZero) {
  for (int i = 0; i < BITMAP_SIZE; ++i) bitmap[i] = 0;
  for (int i = 0; i < nData; ++i) bitmap[data[i] >> 3] |= (1 << (data[i] & 7));
  bitmap[0] &= ~1;  
                    
                    
  minNonZero = BITMAP_SIZE - 1;
  maxNonZero = 0;
  for (int i = 0; i < BITMAP_SIZE; ++i) {
    if (bitmap[i]) {
      if (minNonZero > i) minNonZero = i;
      if (maxNonZero < i) maxNonZero = i;
    }
  }
}
static unsigned short forwardLutFromBitmap(
    const unsigned char bitmap[BITMAP_SIZE], unsigned short lut[USHORT_RANGE]) {
  int k = 0;
  for (int i = 0; i < USHORT_RANGE; ++i) {
    if ((i == 0) || (bitmap[i >> 3] & (1 << (i & 7))))
      lut[i] = k++;
    else
      lut[i] = 0;
  }
  return k - 1;  
}  
static unsigned short reverseLutFromBitmap(