swift

4d1d8a9d - [Observation] Add property definite initialization support (#65984)

[Observation] Add property definite initialization support (#65984) * [Observation] Transition to peer macros instead of arbitrary members * [Observation] Lift the initializer requirement by utilizing init accessors for fully formed definite initialization * [Observation] Gate enabling of peer macros by flag * [Observation] Enable feature for InitAccessors in the observation tests * [Observation] Add tests to validate memberwise and definite initialization