Add APIs to prune completed state for LSPS1/LSPS2/LSPS5 #23145

Job	Run time
benchmark	17m 43s
ext-test	5m 26s
check_docs	4m 17s
linting	1m 8s
fuzz	48m 18s
fuzz_sanity	20m 0s
tor-connect	5m 39s
rustfmt	13s
check_release	1m 30s
build-nostd / build (self-hosted, 1.75.0)	21m 48s
build-cfg-flags / build (self-hosted, 1.75.0)	11m 50s
build-workspace / build (self-hosted, 1.75.0)	18m 52s
build-features / build (self-hosted, 1.75.0)	35m 47s
build-bindings / build (self-hosted, 1.75.0)	26m 13s
build-sync / build (self-hosted, 1.75.0)	26m 56s
coverage	18m 52s
notify-failure	-1s
	4h 24m 31s

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