IBC Rate Limit

[Taztingo]

Description

Adds Osmosis' ibc-rate-limit module to Provenance.

closes: #1498

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• 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.
• 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
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #1692 (78217fc) into main (5553cbd) will decrease coverage by 0.06%.
Report is 2 commits behind head on main.
The diff coverage is 70.82%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1692      +/-   ##
==========================================
- Coverage   74.01%   73.96%   -0.06%     
==========================================
  Files         295      314      +19     
  Lines       44072    44875     +803     
==========================================
+ Hits        32622    33190     +568     
- Misses      10087    10296     +209     
- Partials     1363     1389      +26     

Files	Coverage Δ
app/app.go	85.12% <100.00%> (+0.22%)	⬆️
app/upgrades.go	64.16% <ø> (ø)
cmd/provenanced/cmd/root.go	72.06% <100.00%> (+0.17%)	⬆️
internal/ibc/ibc.go	100.00% <100.00%> (ø)
x/ibcratelimit/events.go	100.00% <100.00%> (ø)
x/ibcratelimit/genesis.go	100.00% <100.00%> (ø)
x/ibcratelimit/keeper/msg_server.go	100.00% <100.00%> (ø)
x/ibcratelimit/msgs.go	100.00% <100.00%> (ø)
x/ibcratelimit/params.go	100.00% <100.00%> (ø)
x/ibcratelimit/simulation/decoder.go	100.00% <100.00%> (ø)
... and 14 more

[iramiller]

lgtm.