Animation: update image active frame when update the rendering (#36286)HEADmain

When no CSS animation exist, register timer for image animation, update
animated image active image frame as part of update_the_rendering, mark
node as dirty if the corresponding image need update. Added unit test to
test ImageAnimationState.

Part of https://github.com/servo/servo/issues/36057, the last step to
let the Animated Image "Move".

Testing: Introduced new WPT RefTest for animated image, but fail because
of https://github.com/servo/servo/issues/36931. New unit test for
`ImageAnimationState`.
Fixes: https://github.com/servo/servo/issues/22903
https://github.com/servo/servo/issues/36057

[Try](https://github.com/rayguo17/servo/actions/runs/14724729664)

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

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