fix: use num pods in k8 job summary

[azhou-determined]

Ticket

Description

we recently changed k8 submissions from pods to jobs, but this resource summary object doesn't reflect a job containing multiple pods

Test Plan

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]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 48.99%. Comparing base (439734b) to head (799d7c8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9497      +/-   ##
==========================================
- Coverage   49.00%   48.99%   -0.01%     
==========================================
  Files        1235     1235              
  Lines      160191   160191              
  Branches     2781     2780       -1     
==========================================
- Hits        78494    78485       -9     
- Misses      81522    81531       +9     
  Partials      175      175              

Flag	Coverage Δ
backend	43.82% <100.00%> (-0.02%)	⬇️
harness	63.96% <ø> (ø)
web	44.12% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
master/internal/rm/kubernetesrm/resource_pool.go	72.53% <100.00%> (ø)

... and 4 files with indirect coverage changes

[NicholasBlaskey]

I would request the the k8s test suite on circleci and wait for it to pass just to be safe