tests: fix concurrent accout commits in TestLedgerVerifiesOldStateProofs

[algorandskiy]

Summary

TestLedgerVerifiesOldStateProofs uses manual account commit scheduling with automatic one that rarely brings tracker into invalid state as seen in this build:

produceCommittingTask: block 3328 too far in the future, lookback 4, dbRound 3277 (cached 3320), deltas 8

2024-07-09T01:35:21.030105 +0000 level=error msg=[Stack] goroutine 346823 [running]:
runtime/debug.Stack()
	/opt/cibuild/.gimme/versions/go1.21.10.linux.arm64/src/runtime/debug/stack.go:24 +0x6c
github.com/algorand/go-algorand/logging.logger.Panicf({0xc0000f42a0?, 0xc0008660a8?}, {0x2495c48, 0x65}, {0xc0041c29b0, 0x5, 0x5})
	/opt/cibuild/project/logging/log.go:282 +0xb0
github.com/algorand/go-algorand/ledger.(*accountUpdates).produceCommittingTask(0xc000f5e420, 0xd00, 0xccd, 0xc003fdc600)
	/opt/cibuild/project/ledger/acctupdates.go:640 +0x3b4
github.com/algorand/go-algorand/ledger.(*trackerRegistry).produceCommittingTask(0xc000f5ea80, 0xd00?, 0xc003fa5990?, 0xc003fdc600)
	/opt/cibuild/project/ledger/tracker.go:404 +0x158
github.com/algorand/go-algorand/ledger.triggerTrackerFlush(0x0?, 0xc000f5e000)
	/opt/cibuild/project/ledger/ledger_test.go:1496 +0x1e4
github.com/algorand/go-algorand/ledger.TestLedgerVerifiesOldStateProofs(0xc002ef11e0)
	/opt/cibuild/project/ledger/ledger_test.go:1686 +0xd84
testing.tRunner(0xc002ef11e0, 0x272e698)
	/opt/cibuild/.gimme/versions/go1.21.10.linux.arm64/src/testing/testing.go:1595 +0x1b4
created by testing.(*T).Run in goroutine 1
	/opt/cibuild/.gimme/versions/go1.21.10.linux.arm64/src/testing/testing.go:1648 +0x5ec
 file=acctupdates.go function=github.com/algorand/go-algorand/ledger.(*accountUpdates).produceCommittingTask
~

Test Plan

This is a test fix.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 56.15%. Comparing base (a9641a3) to head (46ecb22).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6060      +/-   ##
==========================================
- Coverage   56.16%   56.15%   -0.01%     
==========================================
  Files         488      488              
  Lines       69432    69432              
==========================================
- Hits        38995    38990       -5     
+ Misses      27792    27789       -3     
- Partials     2645     2653       +8     

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[cce]

OK cool just like #6024 .. I wonder if there are more like these