fix: Use msg token amount as fee amount for gmp ibc transfer

[rbajollari]

Description

closes: #XXXX

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Author Checklist

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Reviewers Checklist

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• confirmed the correct type prefix in the PR title
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• manually tested (if applicable)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7835c97) 15.62% compared to head (27101e3) 15.62%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main     #336   +/-   ##
=======================================
  Coverage   15.62%   15.62%           
=======================================
  Files          78       78           
  Lines       19225    19225           
=======================================
  Hits         3003     3003           
  Misses      16069    16069           
  Partials      153      153           

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