Antehandler optimization - revision

[Vvaradinov]

Description

A small refactor to the below reference PR. To avoid calling params for every message retrieve them before the loop. Additionally in order to stay consistent with the structure to the rest of the repo use detailed variable declaration

Closes: #1388 (review)

---

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

---

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 #1393 (6291d17) into main (3ab761b) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1393   +/-   ##
=======================================
  Coverage   56.04%   56.05%           
=======================================
  Files         108      108           
  Lines       10074    10074           
=======================================
+ Hits         5646     5647    +1     
+ Misses       4144     4143    -1     
  Partials      284      284           

Impacted Files	Coverage Δ
app/ante/eth.go	80.42% <100.00%> (+0.26%)	⬆️
x/evm/keeper/params.go	100.00% <100.00%> (ø)
x/feemarket/keeper/params.go	89.28% <100.00%> (ø)