test: fix a test util issue with master config schema assumptions

[hamidzr]

Ticket

Description

a skip logic running on slurm tests would fail due to resource_pools being explicitly set to null
failure report https://hpe-aiatscale.slack.com/archives/C04C9JXB1C2/p1713371230944499

Test Plan

add the ci label and check slurm tests run and pass https://app.circleci.com/pipelines/github/determined-ai/determined?branch=hz-config-check

Checklist

• Changes have been manually QA'd
• User-facing API changes need the "User-facing API Change" label.
• Release notes should be added as a separate file under docs/release-notes/.
  See Release Note for details.
• Licenses should be included for new code which was copied and/or modified from any external code.

[netlify]

✅ Deploy Preview for determined-ui canceled.

Name	Link
🔨 Latest commit	6749af1
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 40.73%. Comparing base (dd7f4b5) to head (6749af1).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9193      +/-   ##
==========================================
- Coverage   45.92%   40.73%   -5.19%     
==========================================
  Files         777      640     -137     
  Lines      107000    95984   -11016     
  Branches     2437     2438       +1     
==========================================
- Hits        49137    39101   -10036     
+ Misses      57631    56651     -980     
  Partials      232      232              

Flag	Coverage Δ
harness	53.50% <ø> (-10.52%)	⬇️
web	35.41% <ø> (ø)

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see 200 files with indirect coverage changes