Add IBC checktx antehandler to v4.x

[ValarDragon]

Description

Uses the IBC check tx ante handler from cosmos/cosmos-sdk#10211, that prevents redundant IBC txs from getting proposed

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

[ValarDragon]

Lets check this on a node before merging. (The v4.x branch didn't pass lint to begin with)

cc @UnityChaos

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (v4.x@c4b5b0e). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             v4.x     #556   +/-   ##
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  Coverage        ?   20.12%           
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  Files           ?      164           
  Lines           ?    23147           
  Branches        ?        0           
=======================================
  Hits            ?     4659           
  Misses          ?    17735           
  Partials        ?      753           

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[UnityChaos]

Works for me so far 👍