fix(rpc): Fix bugs and performance of `getnetworksolps` & `getnetworkhashps` RPCs #2126

Job	Run time
Versioning	0s
Build CD Docker / Build images	5m 24s
Test testnet Zebra CD Docker config file	1m 32s
Test Zebra CD Docker config file	1m 39s
Deploy single ${{ inputs.network }} instance	0s
Deploy ${{ matrix.network }} nodes	0s
Open or update issues for release failures	0s
	8m 35s

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