Update app.go to correctly do module upgrade logic, add authz, IBC v2

[ValarDragon]

Update app.go to correctly do SDK module upgrade logic. This follows after what was done in gaia. cosmos/gaia@v5.0.8...v6.0.0-rc3

The line for adding the IBC channel is added, to make the SDK v0.42 -> IBC v1.2.3 update safe.

This also adds authz into the v5 upgrade.
This also adds the IBC v2 upgrade logic.

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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

[codecov-commenter]

Codecov Report

Merging #610 (7517880) into main (dedcfb8) will increase coverage by 0.01%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #610      +/-   ##
==========================================
+ Coverage   18.43%   18.44%   +0.01%     
==========================================
  Files         172      172              
  Lines       24203    24233      +30     
==========================================
+ Hits         4462     4470       +8     
- Misses      18977    18998      +21     
- Partials      764      765       +1     

Impacted Files	Coverage Δ
app/ante.go	0.00% <ø> (ø)
app/app.go	0.56% <0.00%> (-0.05%)	⬇️
x/txfees/module.go	47.36% <0.00%> (+0.14%)	⬆️
x/incentives/module.go	52.27% <0.00%> (+2.27%)	⬆️
x/lockup/module.go	55.81% <0.00%> (+2.32%)	⬆️
x/gamm/module.go	64.86% <0.00%> (+2.70%)	⬆️
x/mint/module.go	55.55% <0.00%> (+2.77%)	⬆️
x/epochs/module.go	52.77% <0.00%> (+2.77%)	⬆️
... and 2 more

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