Propagate Dispose for ICustomDrawOperation through RenderDataCustomNode. #15224
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What does the pull request do?
Implements IDisposable on RenderDataCustomNode to propagate Dispose for ICustomDrawOperation.
What is the current behavior?
Currently the rendering system does not call Dispose for ICustomDrawOperation. This makes it difficult to know when a draw operation can free its resources. The deferred renderer can call Render on an ICustomDrawOperation multiple times, and so a draw operation needs to be told when it is ready to be disposed.
What is the updated/expected behavior with this PR?
ICustomDrawOperation.Dispose will be called when the renderer removes a draw operation from the scene.
How was the solution implemented (if it's not obvious)?
Implements IDisposable for RenderDataCustomNode, which leads to Dispose being propagated up to the ICustomDrawOperation.
Checklist
Breaking changes
Obsoletions / Deprecations
Fixed issues
Fixes #15221
Discussed in #15206