[MiscDiagnostics] Diagnose passing a non-@objc dynamic KeyPath property to KVO observe #28135
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Passing a KeyPath to a property which is not marked
@objc dynamic
to the KVO observe method can cause unexpected behavior or a runtime trap.Resolves SR-5115
Resolves SR-5159
Resolves SR-5177
Resolves rdar://problem/32593787
Resolves rdar://problem/32775952