catchpoints: add accountsRound check against R-320 horizon values to catchpointFileWriter

[cce]

Summary

Fix issue with onlineaccounts updateRound column for certain accounts in catchpoint files when updateRound < R-320. Renames MakeOnlineAccountsIter to MakeOrderedOnlineAccountsIter (without logic changes) so it is more clear the DB provides an ordering on (account, updround).

Test Plan

Update tests and add new ones.

[codecov]

Codecov Report

Attention: Patch coverage is 56.25000% with 7 lines in your changes missing coverage. Please review.

Project coverage is 51.77%. Comparing base (e60d3dd) to head (acac925).

Files with missing lines	Patch %	Lines
...edger/store/trackerdb/sqlitedriver/sqlitedriver.go	0.00%	2 Missing ⚠️
cmd/catchpointdump/file.go	0.00%	1 Missing ⚠️
ledger/catchupaccessor.go	0.00%	1 Missing ⚠️
ledger/store/trackerdb/dualdriver/dualdriver.go	0.00%	1 Missing ⚠️
ledger/store/trackerdb/generickv/reader.go	0.00%	1 Missing ⚠️
ledger/store/trackerdb/sqlitedriver/kvsIter.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6240      +/-   ##
==========================================
+ Coverage   49.25%   51.77%   +2.52%     
==========================================
  Files         644      644              
  Lines       86521    86526       +5     
==========================================
+ Hits        42617    44801    +2184     
+ Misses      41040    38860    -2180     
- Partials     2864     2865       +1     

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