[JENKINS-73896] Un-inline JavaScript in ResultAction/summary.jelly

[yaroslavafenkin]

JENKINS-73896

Testing done

Tested against a sample project that intentionally has code violations (https://github.com/yaroslavafenkin/bad-project). In job config I've added Record compiler warnings and static analysis results post-build action, added PMD and Checkstyle static analysis tools. In advanced section I've added a quality gate and set the threshold to 3.

https://www.loom.com/share/423b4f0b70584ca5b8bf2f912dc5f849?sid=e77eb4c4-969a-42ee-8e12-df9ebdba0687

https://www.loom.com/share/0294d526ad0e439fafc7106e271716d6?sid=0d659442-3a37-4579-b49b-9a0c83b19f5b

CSP violations that still appear in the "after" video are then ones that are fixed by jenkinsci/echarts-api-plugin#357.

Submitter checklist

• Make sure you are opening from a topic/feature/bugfix branch (right side) and not your main branch!
• Ensure that the pull request title represents the desired changelog entry
• Please describe what you did
• Link to relevant issues in GitHub or Jira
• Link to relevant pull requests, esp. upstream and downstream changes
• Ensure you have provided tests - that demonstrates feature works or fixes the issue

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.57%. Comparing base (e659c7a) to head (9b9eb13).
Report is 20 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1862   +/-   ##
=========================================
  Coverage     82.57%   82.57%           
  Complexity     1360     1360           
=========================================
  Files           249      249           
  Lines          5233     5233           
  Branches        402      402           
=========================================
  Hits           4321     4321           
  Misses          802      802           
  Partials        110      110           

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