Exclude commons-lang dependency

[BobDu]

Exclude commons-lang from dependencies as it is outdated.

Any plugins that require it should explicitly depend on commons-lang3-api.

This is not expected to affect the running of any existing plugins, since commons-lang is still provided. However, this change needs to be addressed when compiling new versions of plugins.

Testing done

### Submitter checklist
- [x] Make sure you are opening from a **topic/feature/bugfix branch** (right side) and not your main branch!
- [x] Ensure that the pull request title represents the desired changelog entry
- [x] 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