Revise internal representation of `Interface` for Windows #303

Job	Run time
Build Channels DragonFlyBSD (stable)	3m 54s
Build Channels Linux (stable)	34s
Build Channels ARM (Linux)	11m 51s
Build Channels Linux (1.70.0)	41s
Build Channels FreeBSD (stable)	3m 18s
Build Channels macOS (stable, macos-14)	16s
Build Channels FreeBSD (1.70.0)	3m 29s
Build Channels NetBSD (stable)	3m 30s
Build Channels macOS (1.70.0, macos-14)	31s
Build Channels OpenBSD (stable)	4m 22s
Build Channels NetBSD (1.70.0)	4m 24s
Build Channels Windows (stable, x86_64-pc-windows-msvc)	36s
Check #[cfg]s	13s
Build Channels Windows (1.70.0, x86_64-pc-windows-msvc)	31s
Style check	11s
success	1s
	38m 22s

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