Merge bitcoin/bitcoin#30510: multiprocess: Add IPC wrapper for Mining… #3

Job	Run time
macOS 14 native, arm64, no depends, sqlite only, gui	23m 4s
ASan + LSan + UBSan + integer, no depends, USDT	1h 17m 3s
test each commit	0s
Win64 native, VS 2022	2h 29m 1s
	4h 9m 8s

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