Merge bitcoin/bitcoin#31543: cmake: Always provide `RPATH` on NetBSD #139

Job	Run time
test each commit	0s
ASan + LSan + UBSan + integer, no depends, USDT	1h 5m 57s
macOS 14 native, arm64, no depends, sqlite only, gui	19m 45s
Win64 native, VS 2022	2h 10m 25s
macOS 14 native, arm64, fuzz	11m 7s
Win64 native fuzz, VS 2022	44m 2s
	4h 31m 16s

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