add support for apng and webp animated image decoding (#37637)

Add support for APNG animated image decoding. Rework `load_from_memory`
image decoding api, to handle all the image format that currently
supported.

Testing: This change should allow `apng` and `webp` format image start
moving, and should make some WPT test related to APNG pass.

Partially address: https://github.com/servo/servo/issues/37493

[wpt try
run](https://github.com/rayguo17/servo/actions/runs/15840339570)

cc @xiaochengh

Signed-off-by: rayguo17 <rayguo17@gmail.com>

tests/wpt/meta/MANIFEST.json

@@ -357193,6 +357193,19 @@
          {}
         ]
        ],
+       "animated-webp-update.tentative.html": [
+        "d82d830205270d4bf32de3f01f3fe69afb44fad3",
+        [
+         "html/semantics/embedded-content/the-img-element/animated-webp-update.tentative.html",
+         [
+          [
+           "/html/semantics/embedded-content/the-img-element/animated-image-update-ref.tentative.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
        "available-images.html": [
         "779ff978689e4f5565b8d45d383efa75ac78b8b2",
         [
@@ -485994,6 +486007,10 @@
          "7694add55e0c98ec3ee5d9110e5fb16b4d819137",
          []
         ],
+        "animated.webp": [
+         "ebe15f88496fd03725df2445034ef0f400af652c",
+         []
+        ],
         "blue-10.png": [
          "62949e08d87dfcdc0987eaef67692c7a1c16aa50",
          []