style: add GitHub action to validate exceptions JSON sorting

[doronkg]

What this PR does / why we need it?

This PR adds a custom GitHub action to validate that the exceptions JSON files are properly sorted. Once a PR is submitted to main branch with modifications under pkg/kor/exceptions, this workflow is invoked.

If unsorted JSON files are found, the workflow will fail and provide the contributor with:

1. List of the unsorted files
2. Command to sort all the unsorted files on-demand

Example:

PR Checklist

• [x] This PR adds K8s exceptions (false positives)
• [x] This PR adds new code
• [ ] This PR includes tests for new/existing code
• [ ] This PR adds docs

GitHub Issue

[XX-XX]

Notes for your reviewers

The sorting validation is based on jq in Bash.

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 40.96%. Comparing base (5b9c270) to head (c927585). Report is 3 commits behind head on main.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #295 +/- ## ======================================= Coverage 40.96% 40.96% ======================================= Files 58 58 Lines 2910 2910 ======================================= Hits 1192 1192 Misses 1530 1530 Partials 188 188 ```

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