fix: revert changes from TypedEvents

[Vvaradinov]

Closes: #XXX

Description

This PR reverts the changes made in #1544 as they are breaking the RPCs. Further changes will be made and tested in #1592 but for the time being to unblock immediate work this is being reverted.

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #1600 (d8e134f) into main (9003b6f) will increase coverage by 0.11%.
The diff coverage is 97.56%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1600      +/-   ##
==========================================
+ Coverage   68.19%   68.31%   +0.11%     
==========================================
  Files         110      110              
  Lines       10087    10087              
==========================================
+ Hits         6879     6891      +12     
+ Misses       2801     2793       -8     
+ Partials      407      403       -4     

Impacted Files	Coverage Δ
x/evm/keeper/msg_server.go	90.90% <96.15%> (+3.54%)	⬆️
x/evm/keeper/keeper.go	87.13% <100.00%> (+1.58%)	⬆️
x/feemarket/keeper/abci.go	93.02% <100.00%> (+13.02%)	⬆️

[fedekunze]

LGTM, although there's no need to remove the proto files