R4R: Don't Burn Deposits for Rejected Governance Proposals Unless Vetoed

[sunnya97]

closes #4373 as per Cosmos Hub Governance Proposal 6.

• 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 tests

• Updated relevant documentation (docs/)

• Added a relevant changelog entry: clog add [section] [stanza] [message]

• rereviewed Files changed in the github PR explorer

---

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 #4374 into master will decrease coverage by 0.02%.
The diff coverage is 61.53%.

@@            Coverage Diff             @@
##           master    #4374      +/-   ##
==========================================
- Coverage    58.1%   58.08%   -0.03%     
==========================================
  Files         235      235              
  Lines       14879    14881       +2     
==========================================
- Hits         8646     8643       -3     
- Misses       5605     5608       +3     
- Partials      628      630       +2

[cwgoes]

Looks fine to me, probably needs an sdkch entry.

[sabau]

LGTM this should also help on the related issue on REST 👍

[alexanderbez]

ACK 👌