Allow HPA to work when Inference is enabled (#4247)

[sjberman]

Cherrypick of #4247

Problem: When the Inference Extension was enabled, the additional container was not given resource specifications, which prevented the HPA from working.

Solution: Add the resource specifications from the NGINX container to the inference container.

Release notes

If this PR introduces a change that affects users and needs to be mentioned in the release notes,
please add a brief note that summarizes the change.

Fix bug that prevented HPA from working when Inference Extension was enabled.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.19%. Comparing base (59fd539) to head (fef86cf).

Additional details and impacted files

@@               Coverage Diff               @@
##           release-2.2    #4248      +/-   ##
===============================================
- Coverage        86.20%   86.19%   -0.02%     
===============================================
  Files              131      131              
  Lines            14313    14316       +3     
  Branches            74       74              
===============================================
+ Hits             12338    12339       +1     
- Misses            1774     1775       +1     
- Partials           201      202       +1     

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