enhancement: more integration test refactoring

[shiqizng]

remove proc(&rpcs.EncodedBlockCert{Block: block}) from integration tests.

[codecov]

Codecov Report

Merging #1424 (3dc5d19) into develop (fe96f24) will decrease coverage by 0.06%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1424      +/-   ##
===========================================
- Coverage    65.10%   65.04%   -0.06%     
===========================================
  Files           79       79              
  Lines        11276    11276              
===========================================
- Hits          7341     7335       -6     
- Misses        3370     3374       +4     
- Partials       565      567       +2     

Impacted Files	Coverage Δ
accounting/eval_preload.go	57.75% <0.00%> (-1.61%)	⬇️
idb/postgres/postgres.go	65.21% <0.00%> (-0.14%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[tzaffi]

This looks good. In the long term, I think it should be made easy to onboard someone into creating the *.vb fixtures and writing these e2e tests, and I understand that there is design doc that is being planned to address this issue.

[winder]

LGTM