tests: fix flaky TestTxHandlerRememberReportErrorsWithTxPool

[algorandskiy]

Summary

Sometimes on CI block listener is not triggered or triggered before the waiter. Fixed by

1. adding more than one blocks
2. having a waiting timeout

Test Plan

This is a test fix.

[codecov]

Codecov Report

Merging #4905 (e3f8776) into master (bd64ce8) will increase coverage by 0.51%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4905      +/-   ##
==========================================
+ Coverage   54.08%   54.59%   +0.51%     
==========================================
  Files         427      431       +4     
  Lines       53528    53568      +40     
==========================================
+ Hits        28948    29246     +298     
+ Misses      22314    22028     -286     
- Partials     2266     2294      +28     

Impacted Files	Coverage Δ
cmd/tealdbg/debugger.go	72.69% <0.00%> (-0.81%)	⬇️
network/wsNetwork.go	64.92% <0.00%> (ø)
util/tcpinfo_darwin.go	0.00% <0.00%> (ø)
util/db/fullfsync_darwin.go	100.00% <0.00%> (ø)
util/sleep.go	0.00% <0.00%> (ø)
libgoal/lockedFileUnix.go	0.00% <0.00%> (ø)
data/transactions/logic/eval.go	90.19% <0.00%> (+0.03%)	⬆️
agreement/player.go	96.61% <0.00%> (+0.28%)	⬆️
crypto/merkletrie/cache.go	89.02% <0.00%> (+0.29%)	⬆️
data/bookkeeping/block.go	56.61% <0.00%> (+0.33%)	⬆️
... and 20 more

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[michaeldiamant]

The full build passes - https://app.circleci.com/pipelines/github/algorand/go-algorand/11231/workflows/c14d5d85-bf60-4979-92b1-54f651eadc93.

I admit I'm not intimately familiar with the PR's changes. However, it only changes tests and so I think it's reasonable to merge.