Prefactor for Trampoline MPP accumulation #22590

Job	Run time
benchmark	16m 41s
ext-test	5m 15s
check_release	2m 55s
linting	2m 32s
rustfmt	15s
fuzz_sanity	8m 0s
tor-connect	5m 28s
check_docs	5m 50s
fuzz	44m 23s
build-bindings / build (self-hosted, 1.75.0)	27m 55s
build-sync / build (self-hosted, 1.75.0)	21m 11s
build-cfg-flags / build (self-hosted, 1.75.0)	18m 46s
build-features / build (self-hosted, 1.75.0)	35m 28s
build-nostd / build (self-hosted, 1.75.0)	22m 34s
build-workspace / build (self-hosted, 1.75.0)	15m 39s
coverage	24m 18s
notify-failure	0s
	4h 17m 10s

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