Fix dryrun crash on rewards calculation

[algorandskiy]

Summary

dryrun/tealdbg ledgers do not have block info so cannot provide correct value of rewardLevel used in balance calculation for balance opcode. Fixed by clearing RewardBase field in account data returned by dryrun/tealdbg ledgers.

The crash was reported at the community forum.

Test Plan

Test added

[jasonpaulos]

Looks like a good fix to me

[codecov-commenter]

Codecov Report

Merging #2894 (d0962b4) into master (b7a5b82) will decrease coverage by 0.00%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master    #2894      +/-   ##
==========================================
- Coverage   47.27%   47.27%   -0.01%     
==========================================
  Files         355      355              
  Lines       57199    57202       +3     
==========================================
+ Hits        27040    27041       +1     
- Misses      27101    27102       +1     
- Partials     3058     3059       +1     

Impacted Files	Coverage Δ
daemon/algod/api/server/v2/account.go	78.20% <0.00%> (ø)
cmd/tealdbg/localLedger.go	59.15% <100.00%> (+0.58%)	⬆️
daemon/algod/api/server/v2/dryrun.go	61.90% <100.00%> (+0.11%)	⬆️
cmd/algoh/blockWatcher.go	77.77% <0.00%> (-3.18%)	⬇️
ledger/blockqueue.go	81.03% <0.00%> (-1.15%)	⬇️
ledger/acctupdates.go	62.55% <0.00%> (-0.09%)	⬇️
network/wsPeer.go	74.37% <0.00%> (ø)
network/requestTracker.go	71.55% <0.00%> (+0.43%)	⬆️
catchup/peerSelector.go	100.00% <0.00%> (+1.04%)	⬆️

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[jannotti]

Seems right.