Remove commons-lang2 usages

[gbhat618]

Prepare for jenkinsci/jenkins#26105 by replacign lang2 usages with jdk api equivalents.

Testing done

Enforcer ban prop fails before, and succeeds after.

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 demonstrate the feature works or the issue is fixed

[gbhat618]

/label developer

so that we get a release for it to test in jenkinsci/bom#6234