feat: support image pull secrets in genai

[tayritenour]

Ticket

GAS-1112 (part of GAS-1111)

Description

Populate image pull secrets on k8s deployments correctly. Passing it in the environment variables allows the genai backend to create experiments with the secret bound.

Test Plan

Does not need to be tested in release party.

Checklist

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

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 52.99%. Comparing base (a498008) to head (eb89802).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9653   +/-   ##
=======================================
  Coverage   52.99%   52.99%           
=======================================
  Files        1255     1255           
  Lines      152884   152884           
  Branches     3233     3234    +1     
=======================================
+ Hits        81019    81026    +7     
+ Misses      71714    71707    -7     
  Partials      151      151           

Flag	Coverage Δ
backend	44.19% <ø> (+0.01%)	⬆️
harness	72.77% <ø> (ø)
web	51.37% <ø> (ø)

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

see 8 files with indirect coverage changes

[netlify]

✅ Deploy Preview for determined-ui ready!

Name	Link
🔨 Latest commit	eb89802
🔍 Latest deploy log	https://app.netlify.com/sites/determined-ui/deploys/6691aea1182d770008abdda1
😎 Deploy Preview	https://deploy-preview-9653--determined-ui.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.