Use gogoproto.customname to name EnableEVMHook parameter

[danburck]

Closes: #XXX

Description

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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 #99 (b8011aa) into main (62b8f10) will not change coverage.
The diff coverage is 100.00%.

❗ Current head b8011aa differs from pull request most recent head 7db9971. Consider uploading reports for the commit 7db9971 to get more accurate results

@@           Coverage Diff           @@
##             main      #99   +/-   ##
=======================================
  Coverage   74.47%   74.47%           
=======================================
  Files          22       22           
  Lines        1610     1610           
=======================================
  Hits         1199     1199           
  Misses        354      354           
  Partials       57       57           

Impacted Files	Coverage Δ
app/app.go	82.70% <100.00%> (ø)
x/intrarelayer/keeper/msg_server.go	79.21% <100.00%> (ø)

[fedekunze]

ACK, can you add API breaking change entry on the Changelog?