test: TestAcctUpdatesLookupLatestCacheRetry Randomly fails

[algonautshant]

TestAcctUpdatesLookupLatestCacheRetry randomly fails.

Draft PR: indicating the cause of the failure with xxxx marker. to fix.

repro:
go test -run TestAcctUpdatesLookupLatestCacheRetry -count=20

    acctupdates_test.go:2470:
        	Error Trace:	/Users/shantkarakashian/go/src/github.com/algorand/3/go-algorand/ledger/acctupdates_test.go:2470
        	Error:      	Received unexpected error:
        	            	database round 0 is behind in-memory round 2
        	Test:       	TestAcctUpdatesLookupLatestCacheRetry

[codecov]

Codecov Report

Merging #5566 (a7b2eac) into master (aeef625) will decrease coverage by 0.88%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #5566      +/-   ##
==========================================
- Coverage   55.80%   54.93%   -0.88%     
==========================================
  Files         446      446              
  Lines       63417    63417              
==========================================
- Hits        35389    34836     -553     
- Misses      25663    26182     +519     
- Partials     2365     2399      +34     

Impacted Files	Coverage Δ
ledger/acctupdates.go	70.68% <0.00%> (-0.12%)	⬇️

... and 56 files with indirect coverage changes

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