Add occ test for multiple EVM transactions in a block

[codchen]

Describe your changes and provide context

Testing performed to validate your change

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.51%. Comparing base (81c0d5f) to head (7c33604).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1903      +/-   ##
==========================================
- Coverage   61.57%   61.51%   -0.07%     
==========================================
  Files         263      263              
  Lines       23306    23306              
==========================================
- Hits        14351    14337      -14     
- Misses       7948     7961      +13     
- Partials     1007     1008       +1     

Files with missing lines	Coverage Δ
app/app.go	66.35% <100.00%> (ø)

... and 2 files with indirect coverage changes