[SILGen] Enable protocol extension version of _unconditionallyBridgeToObjectiveC
[SILGen] Enable protocol extension version of _unconditionallyBridgeToObjectiveC

apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation