feature(lint): Add linter to priorityClassName

[jonathanmdr]

This pull request introduces a new check for validating priority class names in Kubernetes objects. The changes include the addition of a new template, corresponding parameters, and test cases. The most important changes are summarized below:

Issues:

• Closes: [FEATURE_REQUEST] Need check for priorityClassName value #794

New Template and Parameters:

• pkg/templates/priorityclassname/template.go: Added a new template priority-class-name to flag applications running with invalid priority class names.
• pkg/templates/priorityclassname/internal/params/gen-params.go: Generated code for handling parameters related to the new template.
• pkg/templates/priorityclassname/internal/params/params.go: Defined the Params struct to hold the accepted priority class names.

Test Cases:

• pkg/templates/priorityclassname/template_test.go: Added test cases to validate the new template for different scenarios, including valid, invalid, and empty priority class names.

Configuration and Integration:

• pkg/builtinchecks/yamls/priority-class-name.yaml: Added a new check configuration for priority-class-name.
• pkg/templates/all/all.go: Imported the new template to ensure it is included in the build.

E2E Tests:

• e2etests/bats-tests.sh: Added an end-to-end test for the new priority-class-name check.
• tests/checks/priority-class-name.yaml: Added YAML configurations for testing the new check.

[jonathanmdr]

Hi @rhybrillou and @janisz!

Can you spend some time reviewing this PR?

If there's any feedback about this approach, I will be happy to follow up on it. 😄

[codecov]

Codecov Report

Attention: Patch coverage is 52.50000% with 19 lines in your changes missing coverage. Please review.

Project coverage is 28.64%. Comparing base (dbd7529) to head (255aa77).
Report is 120 commits behind head on main.

Files with missing lines	Patch %	Lines
...es/priorityclassname/internal/params/gen-params.go	0.00%	19 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #926       +/-   ##
===========================================
- Coverage   62.36%   28.64%   -33.72%     
===========================================
  Files         197      203        +6     
  Lines        4854     5872     +1018     
===========================================
- Hits         3027     1682     -1345     
- Misses       1439     4075     +2636     
+ Partials      388      115      -273     

Flag	Coverage Δ
unit	28.64% <52.50%> (-33.72%)	⬇️

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[jonathanmdr]

@rhybrillou can you review this PR?

[rhybrillou]

@jonathanmdr Thank you very much for your contribution. I'll target a new kube-linter release including it by the end of the week.