add a check on processing that no outgoing txs are added during super…

[BeniaminDrasovean]

…nova transition

Reasoning behind the pull request

Proposed changes

Testing procedure

Pre-requisites

Based on the Contributing Guidelines the PR author and the reviewers must check the following requirements are met:

• was the PR targeted to the correct branch?
• if this is a larger feature that probably needs more than one PR, is there a feat branch created?
• if this is a feat branch merging, do all satellite projects have a proper tag inside go.mod?

[codecov]

Codecov Report

❌ Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 77.54%. Comparing base (6025b67) to head (02e741e).

Files with missing lines	Patch %	Lines
process/common.go	0.00%	4 Missing ⚠️
process/coordinator/process.go	0.00%	1 Missing and 1 partial ⚠️
process/block/shardblock.go	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@                  Coverage Diff                   @@
##           feat/testnet-fixes    #7872      +/-   ##
======================================================
- Coverage               77.54%   77.54%   -0.01%     
======================================================
  Files                     883      883              
  Lines                  124525   124527       +2     
======================================================
- Hits                    96564    96563       -1     
- Misses                  21550    21552       +2     
- Partials                 6411     6412       +1     

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