Egor Zhdan 35263ef9d6 [cxx-interop][SwiftCompilerSources] Do not use SWIFT_IMPORT_UNSAFE with BridgedOwnedString ...

`SWIFT_IMPORT_UNSAFE` is an escape hatch that can be used to make the Swift compiler ignore its usual safety heuristics for C++ types.

`BridgedOwnedString` fits into the definition of a self-contained C++ type in Swift: it manages the lifetimes of its own fields.

This removes the usages of `SWIFT_IMPORT_UNSAFE` for C++ functions that return `BridgedOwnedString`, and annotates `BridgedOwnedString` as a self-contained type.

2024-09-11 19:58:14 +01:00

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