Do not ignore objects without pod template in dangling-horizontalpodautoscaler

[mboutet]

Fixes #932.

I personally don't understand why the object referenced in the scaleTargetRef of the HPA needs to have a pod template in its manifest. I find this pre-condition to be out of scope for this check. The check should only ensure that the referenced object in scaleTargetRef exists in the linting context. There are way too many custom resources that have the /scale sub-resource without defining by default a pod template in their manifest.

I also checked the original PR #271 implementing this check and I could not find any comment or commits explaining why this pre-condition is necessary.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.01%. Comparing base (dbd7529) to head (f5e851b).
Report is 102 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #933      +/-   ##
==========================================
- Coverage   62.36%   59.01%   -3.35%     
==========================================
  Files         197      201       +4     
  Lines        4854     5829     +975     
==========================================
+ Hits         3027     3440     +413     
- Misses       1439     1994     +555     
- Partials      388      395       +7     

Flag	Coverage Δ
unit	59.01% <ø> (-3.35%)	⬇️

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[mboutet]

Well, never mind, the issue is actually that kube-linter doesn't parse all custom objects and my issues was with a KafkaNodePool custom resource targeted by an HPA.