[#1411] Refactor AccountBalance to use Balance for transparent funds #5968

Job	Run time
Build target wasm32-wasi	52s
Latest build on ubuntu-latest	2m 7s
Latest build on windows-latest	4m 46s
Latest build on macOS-latest	2m 38s
Bitrot check	1m 29s
Check ZFuture build on Linux	28s
Check ZFuture build on macOS	33s
Clippy (MSRV)	1m 20s
Check ZFuture build on Windows	2m 47s
Clippy (beta)	11s
Code coverage	57m 51s
Intra-doc links	2m 7s
Rustfmt	20s
protobuf consistency	1m 5s
Test on Linux	9m 5s
UUID validity	2s
Test Orchard on Linux	10m 51s
Test NU6 on Linux	9m 1s
Test on macOS	9m 47s
Test Orchard on macOS	15m 2s
Test on Windows	16m 31s
Test Orchard on Windows	21m 3s
Test NU6 on Windows	17m 36s
	3h 7m 32s

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