[#1411] Refactor AccountBalance to use Balance for transparent funds #6015

Job	Run time
Build target wasm32-wasi	50s
Latest build on ubuntu-latest	2m 4s
Check ZFuture build on Linux	23s
Test on Linux	8m 53s
Latest build on windows-latest	4m 37s
Check ZFuture build on macOS	48s
Latest build on macOS-latest	1m 36s
Test Orchard on Linux	10m 54s
Check ZFuture build on Windows	2m 49s
Test NU7 on Linux	8m 59s
Bitrot check	1m 31s
Test on macOS	11m 6s
Clippy (MSRV)	1m 18s
Test Orchard on macOS	20m 21s
Test on Windows	18m 10s
Clippy (beta)	16s
Code coverage	58m 22s
Test Orchard on Windows	21m 45s
Test NU7 on Windows	18m 26s
Intra-doc links	2m 13s
Rustfmt	14s
protobuf consistency	1m 5s
UUID validity	3s
Required status checks have passed	1s
	3h 16m 44s

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