Build.snapcraft.io integration

[alessio]

• Linked to github-issue with discussion and accepted design OR link to spec that describes this work.
• Wrote tests
• Updated relevant documentation (docs/)
• Added entries in PENDING.md with issue #
• 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 #3489 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #3489   +/-   ##
========================================
  Coverage    59.42%   59.42%           
========================================
  Files          130      130           
  Lines         9804     9804           
========================================
  Hits          5826     5826           
  Misses        3608     3608           
  Partials       370      370

[cwgoes]

ACK - merging per in-person discussion