imp(osmosis-outpost): use wrapper structure for parsed Swap inputs

[0xstepit]

Description

This PR is a followup of the Osmosis outpost implementing a suggestion from @facs95 . The arguments from the Solidity side are now wrapped into a structure. This will:

make the code more readable
make the code more maintainable
avoiding polyadic functions.

---

Closes #XXX

[Vvaradinov]

LGTM!

[codecov]

Codecov Report

Merging #2025 (2dff188) into main (e58621a) will increase coverage by 0.03%.
Report is 3 commits behind head on main.
The diff coverage is 95.74%.

❗ Current head 2dff188 differs from pull request most recent head fd1ca1f. Consider uploading reports for the commit fd1ca1f to get more accurate results

@@            Coverage Diff             @@
##             main    #2025      +/-   ##
==========================================
+ Coverage   69.87%   69.91%   +0.03%     
==========================================
  Files         334      334              
  Lines       24946    24978      +32     
==========================================
+ Hits        17431    17463      +32     
  Misses       6611     6611              
  Partials      904      904              

Files	Coverage Δ
precompiles/outposts/osmosis/tx.go	87.87% <100.00%> (+3.46%)	⬆️
precompiles/outposts/osmosis/types.go	92.03% <92.00%> (+0.77%)	⬆️