Merge JoinMarket-Org/joinmarket-clientserver#1610: Deduplicate wallet… #1828

Job	Run time
python 3.7, bitcoind 0.18.0 on macos-latest	14m 27s
python 3.7, bitcoind 25.1 on macos-latest	18m 37s
python 3.11, bitcoind 0.18.0 on macos-latest	13m 56s
python 3.11, bitcoind 25.1 on macos-latest	18m 17s
python 3.7, bitcoind 0.18.0 on ubuntu-latest	8m 10s
python 3.7, bitcoind 25.1 on ubuntu-latest	9m 41s
python 3.11, bitcoind 0.18.0 on ubuntu-latest	8m 6s
python 3.11, bitcoind 25.1 on ubuntu-latest	9m 34s
	1h 40m 48s

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