Set log index across all transactions in a block

[codchen]

Describe your changes and provide context

Previously if we have two EVM transactions in the same block, each with 1 log, both logs will have log index of 0, because log index was set relative to each transaction. The expected behavior is for log index to be set across transactions in a block (i.e. the log of the first tx would have index 0, whereas the log of the second would have index 1).

It is not quite feasible to set log index as such during execution though, because transactions may be processed in parallel, so this PR adds backfill log on the read path instead.

Testing performed to validate your change

unit test

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.56%. Comparing base (9595df6) to head (630b24e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2067      +/-   ##
==========================================
+ Coverage   61.54%   61.56%   +0.01%     
==========================================
  Files         264      264              
  Lines       24645    24647       +2     
==========================================
+ Hits        15168    15174       +6     
+ Misses       8347     8344       -3     
+ Partials     1130     1129       -1     

Files with missing lines	Coverage Δ
app/receipt.go	86.63% <100.00%> (ø)
evmrpc/filter.go	75.49% <100.00%> (+0.16%)	⬆️
evmrpc/tx.go	68.16% <100.00%> (ø)
x/evm/keeper/log.go	45.76% <100.00%> (ø)

... and 1 file with indirect coverage changes