b9431e88fb5a066b91b7b630ad926f77700f65cb

In certain cases seen in production, simplify() can returned undefined when simplifying decorator metadata. This has proven tricky to reproduce in an isolated test, but the fix is simple and low-risk: don't attempt to spread an undefined set of annotations in the first place. PR Close #23349
revert: refactor(ivy): make return value of define(Component|Directive|Pipe|Injector|Injectable) private (#23371)
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