test(functional): fix more flaky consensus tests

[oXtxNt9U]

Summary

Ensure all message count asserts that include nil votes produced by timeouts are awaited first.

This should hopefully fix all remaining tests together with #1471

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.41%. Comparing base (48a0795) to head (53366eb).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1474      +/-   ##
===========================================
+ Coverage    78.05%   78.41%   +0.35%     
===========================================
  Files          953      964      +11     
  Lines        16312    16749     +437     
  Branches      2350     2425      +75     
===========================================
+ Hits         12733    13134     +401     
- Misses        3574     3608      +34     
- Partials         5        7       +2     

Flag	Coverage Δ
contracts	91.76% <ø> (?)
packages	78.05% <ø> (ø)

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