Don't visit synthesized extensions twice. #65291
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Teach `getTopLevelDeclsWithAuxiliaryDecls` not to provide extension declarations, because those are covered by the synthesized file, which all clients need to walk anyway. Without this, we end up asserting in TBD generation about duplicate symbol visitation. Encountered while investigating rdar://108056018.
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Teach
getTopLevelDeclsWithAuxiliaryDeclsnot to provide extension declarations, because those are covered by the synthesized file, which all clients need to walk anyway. Without this, we end up asserting in TBD generation about duplicate symbol visitation.Encountered while investigating rdar://108056018.