[NFC] Add implicit cast kinds for function pointer conversions #110047
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The new cast kinds are needed to distinguish between no-op conversions and conversions from pointers to noexcept functions to pointers to functions without noexcept as the latter can cause function pointers to be re-signed on arm64e. See llvm#109056 for background.
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The new cast kinds are needed to distinguish between no-op conversions and conversions from pointers to noexcept functions to pointers to functions without noexcept as the latter can cause function pointers to be re-signed on arm64e.
See #109056 for background.