[FLINK-38159] Update commons-lang3 dependency to 3.18.0

[kornys]

What is the purpose of the change

• Update common-lang3 dependency

Brief change log

• Update common-lang3 dependency version

Verifying this change

This change is a trivial rework / code cleanup without any test coverage.

Does this pull request potentially affect one of the following parts:

• Dependencies (does it add or upgrade a dependency): (yes)
• The public API, i.e., is any changes to the CustomResourceDescriptors: (no)
• Core observer or reconciler logic that is regularly executed: (no)

Documentation

• Does this pull request introduce a new feature? (no)
• If yes, how is the feature documented? (not applicable)