Fixes for C++ impl for `DeserializeStage` and add missing `get_info` overloads to `SlicedMessageMeta`

Description

Replace incorrect usage of self.supports_cpp_node() with self._build_cpp_node() in DeserializeStage to determine if a C++ impl should be used.
Chose either _stages.DeserializeControlMessageStage or _stages.DeserializeMultiMessageStage based on the message type (likely this was a merge error).
Add missing get_info(const std::string&) and get_info(const std::vector<std::string>&) to SlicedMessageMeta which indirectly fixes the cuda memory errors in #1747

Closes #1747

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When the PR is ready for review, new or existing tests cover these changes.
When the PR is ready for review, the documentation is up to date with these changes.