[dev-overlay] Fix error dialog resizing logic (#77830)
This PR improves our height resizing strategy. Animating the height on
page load or when the dialog opens is not ideal and it would be better
if the dialog would just fade in and assume it's intrinsic height
without motion.
This is what happens before this PR when you open errors, and it can be
distracting to experience such amount of motion at once:
https://github.com/user-attachments/assets/eb03cc23-395e-4ff4-9ed2-ace1694ad917
The reason this happens is because some of the dialog contents load in
async—for example the errors are actually suspended so that the message
can be viewed without waiting for the stack frames to load:
https://github.com/vercel/next.js/blob/1751db082d8c791e05ac1481a5036c8fb381d831/packages/next/src/client/components/react-dev-overlay/ui/container/errors.tsx#L202-L208
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After this PR, we still measure the `height` of the dialog and animate
it in response to user input, but only use the value when the height has
stabilised. You can see what happens by observing the blue height value:
https://github.com/user-attachments/assets/cf4c1e0f-5e2e-49ed-b94a-1df9822f20cc
And another video from the fixture app:
https://github.com/user-attachments/assets/a285253f-f320-4638-b19e-b7a27a434ee6
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Closes NDX-983
