test: group poa admin

[fmorency]

Add Group Proposal tests for when POA is a group address (group admin is the group policy itself).

Test

• Software upgrade plan scheduling and canceling
• Manifest module parameters update
  • All parameters
  • Inflation == nil
  • Empty parameters
• Manifest stakeholders payout (mint) and burn (relates #65)
• POA parameters update
  • All parameters
  • Empty admins
• Bank send
  • Valid sender
  • Invalid sender
• Token factory
  • Token create
  • Token modify metadata
  • Token mint and mint to
  • Token burn and burn from
  • Token force transfer
  • Token admin change

This PR is becoming huge so I want to get those merged. We can add more tests later.

Fixes #61

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 83.05085% with 10 lines in your changes are missing coverage. Please review.

Project coverage is 72.31%. Comparing base (b16de8e) to head (7791945).

Files	Patch %	Lines
interchaintest/helpers/group.go	84.31%	4 Missing and 4 partials :warning:
x/manifest/types/params.go	0.00%	1 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #62 +/- ## ========================================== + Coverage 71.96% 72.31% +0.34% ========================================== Files 32 33 +1 Lines 1737 1795 +58 ========================================== + Hits 1250 1298 +48 - Misses 427 432 +5 - Partials 60 65 +5 ```

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[fmorency]

I'll re-run CI tomorrow, the test is failing because we reached the maximum number of Docker requests.