[JENKINS-73759] Remove deprecated usage of Spring Framework class

[alecharp]

See JENKINS-73759.

LocalVariableTableParameterNameDiscoverer was marked as deprecated in favour of StandardReflectionParameterNameDiscoverer. Since Spring Framework 6.1.0-M1, the class was removed from the framework. See spring-projects/spring-framework@4d15b58
Because of this, the plugin faces a bug in Jenkins 2.475+.

As StandardReflectionParameterNameDiscoverer class is present in Spring Framework since version 4.0, this shouldn't be a problem to use the plugin with Jenkins prior or more recent than 2.475.

Testing done

I just compiled the plugin

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

[basil]

Thanks for the PR!