feat(reliable-integration): change ordering to send voided txs first

[glevco]

Motivation

Change the ordering of VERTEX_METADATA_CHANGED events. Before it was ordered by descending timestamp, which is a reverse topological ordering. We now sort by voided txs first, and untie by descending timestamp. This aids Reliable Integration client implementation.

Acceptance Criteria

• Change ordering of events in the consensus to emit voided txs first, and then ordered by descending timestamp.
• Add new UNVOIDED_TRANSACTION event simulator scenario and respective test.
• Add include_metadata parameter in BaseTransaction.clone().

Checklist

• If you are requesting a merge into master, confirm this code is production-ready and can be included in future releases as soon as it gets merged

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (2a86be0) 85.30% compared to head (df903c3) 85.21%.
Report is 1 commits behind head on master.

❗ Current head df903c3 differs from pull request most recent head 59bdf45. Consider uploading reports for the commit 59bdf45 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #876      +/-   ##
==========================================
- Coverage   85.30%   85.21%   -0.09%     
==========================================
  Files         281      281              
  Lines       22364    22372       +8     
  Branches     3388     3387       -1     
==========================================
- Hits        19077    19065      -12     
- Misses       2603     2619      +16     
- Partials      684      688       +4     

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