[Feature] Use custom go-cosmwasm for signal propagation

[yun-yeo]

Summary of changes

• use custom go-cosmwasm to propagate interrupt signal

ref: CosmWasm/cosmwasm#495
close #363

Report of required housekeeping

• Github issue OR spec proposal link
• Wrote tests
• Updated relevant documentation (docs/)
• Added a relevant changelog entry: clog add [section] [stanza] [message]

---

(FOR ADMIN) Before merging

• Added appropriate labels to PR
• Squashed all commits, uses message "Merge pull request #XYZ: [title]" (coding standards)
• Confirm added tests are consistent with the intended behavior of changes
• Ensure all tests pass

[codecov]

Codecov Report

Merging #382 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop     #382   +/-   ##
========================================
  Coverage    65.88%   65.88%           
========================================
  Files          116      116           
  Lines         5821     5821           
========================================
  Hits          3835     3835           
  Misses        1767     1767           
  Partials       219      219