No packages must depend on cmd/gaia/

[alessio]

Preparation work for moving gaia out of the SDK.

• 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: sdkch 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 #4048 into develop will not change coverage.
The diff coverage is 66.66%.

@@           Coverage Diff            @@
##           develop    #4048   +/-   ##
========================================
  Coverage    59.81%   59.81%           
========================================
  Files          212      212           
  Lines        15158    15158           
========================================
  Hits          9066     9066           
  Misses        5448     5448           
  Partials       644      644

[fedekunze]

LGTM