Merge bitcoin/bitcoin#32446: build: simplify *ifaddr handling #75

Job	Run time
Windows native, fuzz, VS 2022	29m 46s
macOS 14 native, arm64, fuzz	11m 39s
macOS 14 native, arm64, no depends, sqlite only, gui	17m 59s
Windows native, VS 2022	1h 24m 46s
Linux->Windows cross, no tests	53m 21s
ASan + LSan + UBSan + integer, no depends, USDT	1h 6m 52s
test each commit	0s
Windows, test cross-built	40m 47s
	5h 5m 10s

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