95edcb81b5
Update the logic in `AbstractBeanFactory` so that caches from merged bean definitions remain whenever possible. Prior to this commit, all merged bean definitions would be completely removed after bean post processing in case a processor changed the bean type. It's fairly unlikely these days that the bean type will actually change, so instead we now compare a subset of the old cached properties against the newly created definition. Only if key properties have changed do we now discard the older cached values. Closes gh-23336
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