txsource: funding of accounts, fees

[ptrus]

Part of: #2506

• use test entity to fund accounts instead of hardcoding balances in genesis
• update parallel tests to include fees
• update staking genesis params

[codecov]

Codecov Report

Merging #2744 into master will increase coverage by 0.14%.
The diff coverage is 53.12%.

@@            Coverage Diff             @@
##           master    #2744      +/-   ##
==========================================
+ Coverage   62.78%   62.92%   +0.14%     
==========================================
  Files         383      384       +1     
  Lines       36159    36258      +99     
==========================================
+ Hits        22701    22815     +114     
+ Misses      10593    10567      -26     
- Partials     2865     2876      +11

Impacted Files	Coverage Δ
.../cmd/debug/txsource/workload/runtimeplaceholder.go	0% <0%> (ø)	⬆️
go/oasis-node/cmd/debug/txsource/txsource.go	67.18% <16.66%> (-4%)	⬇️
...asis-node/cmd/debug/txsource/workload/oversized.go	66% <20%> (-5.74%)	⬇️
...s-node/cmd/debug/txsource/workload/registration.go	74.43% <40%> (-3.93%)	⬇️
...oasis-node/cmd/debug/txsource/workload/parallel.go	57.53% <40.9%> (-9.71%)	⬇️
...oasis-node/cmd/debug/txsource/workload/transfer.go	63.63% <48.27%> (-6.23%)	⬇️
...oasis-node/cmd/debug/txsource/workload/workload.go	77.77% <77.77%> (ø)
go/worker/common/host/interface.go	38.46% <0%> (-15.39%)	⬇️
go/worker/compute/txnscheduler/committee/node.go	62.34% <0%> (-2.17%)	⬇️
go/worker/common/p2p/p2p.go	70.27% <0%> (-0.91%)	⬇️
... and 25 more

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[pro-wh]

ok