[RFC] Add BOLT 12 payer proof primitives #23018

Job	Run time
ext-test	5m 9s
rustfmt	15s
check_docs	8m 25s
benchmark	17m 3s
tor-connect	6m 10s
linting	2m 32s
build-cfg-flags / build (self-hosted, 1.75.0)	12m 9s
fuzz	38m 16s
fuzz_sanity	12m 14s
check_release	2m 56s
build-features / build (self-hosted, 1.75.0)	29m 21s
build-bindings / build (self-hosted, 1.75.0)	17m 41s
build-nostd / build (self-hosted, 1.75.0)	16m 17s
build-workspace / build (self-hosted, 1.75.0)	14m 30s
build-sync / build (self-hosted, 1.75.0)	22m 16s
notify-failure	1s
coverage	1s
	3h 25m 16s

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