Harry Terkelsen 20ef29732d Reland "[web] Enforce onDrawFrame/onBeginFrame render rule" (flutter/engine#49336)
Enforces the render rule on the web except in the HTML renderer, which
must still render to the DOM even outside of `onDrawFrame` or
`onBegineFrame` scopes in order for golden tests to continue to work in
the framework.

This is a reland of https://github.com/flutter/engine/pull/49214 with
one change (checking for `renderer.rendererTag == 'html'` in the
`render` method).

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above.
- [x] I added new tests to check the change I am making or feature I am
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instructions on writing and running engine tests.
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- [x] All existing and new tests are passing.

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2023-12-21 13:10:27 -08:00
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