Migrate pieces of x/genutil missed in #6734

[aaronc]

ref: #6213

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

• 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.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer
• Review Codecov Report in the comment section below once CI passes

[codecov]

Codecov Report

Merging #6860 into master will decrease coverage by 0.00%.
The diff coverage is 71.42%.

@@            Coverage Diff             @@
##           master    #6860      +/-   ##
==========================================
- Coverage   61.55%   61.54%   -0.01%     
==========================================
  Files         509      508       -1     
  Lines       31525    31523       -2     
==========================================
- Hits        19406    19402       -4     
- Misses      10610    10611       +1     
- Partials     1509     1510       +1     

[anilcse]

ACK