Add ubuntucore image check tests to cert test plan (New)

[weizhenwu]

Description

The current ODM certification test plan has a smaller scope than what our QA team tests internally, and it is not sufficient for certification. We will request the ODM to run the same test plan as ours to avoid any gaps.

The ubuntucore image check tests were originally intended only for ODM use, specifically to verify whether the kernel/gadget is from Canonical. This PR adds those tests back into our own certification test plan and consume a manifest so that they are executed only during ODM certification testing.

Resolved issues

N/A

Documentation

N/A

Tests

$ checkbox-carmel-classic.checkbox-cli list-bootstrapped com.canonical.certification::client-cert-iot-ubuntucore-24
...
com.canonical.certification::image/model-grade
com.canonical.certification::image/kernel-publisher-canonical
com.canonical.certification::image/kernel-tracking-stable
com.canonical.certification::image/gadget-publisher-canonical
com.canonical.certification::image/gadget-tracking-stable
com.canonical.certification::image/model-authority-canonical
com.canonical.certification::image/model-brand-canonical
...

Test submission: https://certification.canonical.com/hardware/202510-38024/submission/460076/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 53.57%. Comparing base (47817ad) to head (897de26).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2209      +/-   ##
==========================================
+ Coverage   53.49%   53.57%   +0.08%     
==========================================
  Files         401      401              
  Lines       43079    43087       +8     
  Branches     7983     7985       +2     
==========================================
+ Hits        23045    23084      +39     
+ Misses      19223    19192      -31     
  Partials      811      811              

Flag	Coverage Δ
provider-base	30.70% <ø> (+0.22%)	⬆️
provider-certification-client	57.14% <ø> (ø)

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