fix: Construct closing TX based on original funding TXO #214

Job	Run time
check_commits	26s
build (ubuntu-latest, stable)	9m 10s
build (ubuntu-latest, beta)	8m 49s
build (ubuntu-latest, 1.41.1)	1m 57s
build (ubuntu-latest, 1.45.2)	38s
build (ubuntu-latest, 1.47.0)	11m 17s
build (stable, macos-latest, true, true, true, true)	11m 42s
build (beta, macos-latest, true, true, true, true)	12m 20s
build (stable, windows-latest, true, true, true, false)	4m 28s
build (beta, windows-latest, true, true, true, false)	4m 23s
check_release	1m 35s
benchmark	1m 26s
fuzz	4m 17s
linting	1m 4s
	1h 13m 32s

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