Bump cosmos to v0.46.8-pio-2 with State Listening support

[egaxhaj]

Description

• bumps Cosmos SDK to v0.46.8-pio-2
• adds State Listening support
• updates third_party proto files from v0.46.8-pio-2

closes: #1332

---

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 #1334 (2d2e89c) into main (bb9dcfe) will decrease coverage by 0.03%.
The diff coverage is 28.57%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1334      +/-   ##
==========================================
- Coverage   58.93%   58.90%   -0.03%     
==========================================
  Files         197      197              
  Lines       24783    24804      +21     
==========================================
+ Hits        14606    14612       +6     
- Misses       9085     9099      +14     
- Partials     1092     1093       +1     

Impacted Files	Coverage Δ
app/app.go	85.71% <28.57%> (-1.81%)	⬇️

[nullpointer0x00]

Everything looks good. Just found one issue with a comment being incorrect. Once corrected I'm ready to approve.

[derekadams]

LGTM