ci: try to fix slurm podman tests by not building agent binary

[NicholasBlaskey]

Ticket

Description

Fix failing podman tests not fixed by #9267

Avoid building and packaging the agent again, just use the one built in build-go

Test Plan

test passes on main after

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	c8c9af1
🔍 Latest deploy log	https://app.netlify.com/sites/determined-ui/deploys/663158246f55da00089381c3

[netlify]

✅ Deploy Preview for determined-ui canceled.

Name	Link
🔨 Latest commit	c2aa992
🔍 Latest deploy log	https://app.netlify.com/sites/determined-ui/deploys/6631582ebce60200084ae27f

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.64%. Comparing base (ae91042) to head (c2aa992).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9273      +/-   ##
==========================================
+ Coverage   44.62%   45.64%   +1.02%     
==========================================
  Files        1273      786     -487     
  Lines      155894   108102   -47792     
  Branches     2439     2439              
==========================================
- Hits        69561    49344   -20217     
+ Misses      86094    58519   -27575     
  Partials      239      239              

Flag	Coverage Δ
backend	34.27% <ø> (-7.48%)	⬇️
harness	63.90% <ø> (-0.20%)	⬇️
web	35.04% <ø> (ø)

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

see 491 files with indirect coverage changes