Minor simulation changes

[cwgoes]

• Temporarily disable supply invariants, ref Panic in staking caught by randomized simulation #2063 (comment).
• Run the determinism test with several different seeds
• Run a shorter simulation in CI
• Deduplicate some code in cmd/gaia/app/sim_test.go
• Fix one tiny x/gov log printf issue

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)

[codecov]

Codecov Report

Merging #2068 into release/v0.24.0 will decrease coverage by 0.23%.
The diff coverage is 66.66%.

@@                 Coverage Diff                 @@
##           release/v0.24.0    #2068      +/-   ##
===================================================
- Coverage            63.97%   63.74%   -0.24%     
===================================================
  Files                  113      113              
  Lines                 6665     6669       +4     
===================================================
- Hits                  4264     4251      -13     
- Misses                2118     2133      +15     
- Partials               283      285       +2

[cwgoes]

(moved to #2063 (comment))

[cwgoes]

Removed the quick fixes, those should go in separate PRs.