Require Jenkins 2.479.1 and Jakarta EE 9

[strangelookingnerd]

Require Jenkins 2.479.1 and Jakarta EE 9

Jenkins 2.479.1 provides Jakarta EE 9, Eclipse Jetty 12, Spring Security 6, and Java 17.

• Update plugin pom and baseline
• Remove deprecations
• Use Java 17 language features

Testing done

Confirmed that tests pass.

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

Attention: Patch coverage is 26.66667% with 11 lines in your changes missing coverage. Please review.

Project coverage is 55.20%. Comparing base (5a6cfb6) to head (6a36264).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
.../java/hudson/plugins/msbuild/MsBuildInstaller.java	33.33%	5 Missing and 1 partial ⚠️
...in/java/hudson/plugins/msbuild/MsBuildBuilder.java	16.66%	5 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #187      +/-   ##
============================================
- Coverage     55.50%   55.20%   -0.31%     
  Complexity       73       73              
============================================
  Files             8        8              
  Lines           481      480       -1     
  Branches         57       57              
============================================
- Hits            267      265       -2     
- Misses          202      203       +1     
  Partials         12       12              

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