improve rendering quality when zooming into large images (#5068)

Glide downscales images to fit ImageViews, which makes perfect sense,
except here where the ImageView is zoomable.
Always loading the memory in full resolution of course uses more memory
but I think this is worth the additional quality. If it leds to
performance problems or crashes I will check if we can mitigate those in
another way.

Before / after:


![Screenshot_20250421_111204](https://github.com/user-attachments/assets/f00e9e54-d78b-40af-b2fc-0cfb83e588a6)

![Screenshot_20250421_110843](https://github.com/user-attachments/assets/b8319582-d149-4e47-ac08-7eb8a46be208)

app/src/main/java/com/keylesspalace/tusky/fragment/ViewImageFragment.kt

@@ -282,9 +282,11 @@ class ViewImageFragment : ViewMediaFragment() {
             // Request image from the network on fail load image from cache
             .error(
                 glide.load(url)
+                    .override(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
                     .centerInside()
                     .addListener(ImageRequestListener(false, isThumbnailRequest = false))
             )
+            .override(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)
             .centerInside()
             .addListener(ImageRequestListener(true, isThumbnailRequest = false))
             .into(photoView)