chore: Merge different internal packages related to configuration

[ctlong]

Description

Refactors internal packages config and tls into one config package.

Type of change

• [x] Refactor
• [ ] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Testing performed?

• [x] Unit tests
• [ ] Integration tests
• [ ] Acceptance tests

Checklist:

• [x] This PR is being made against the main branch, or relevant version branch
• [ ] I have made corresponding changes to the documentation
• [ ] I have added testing for my changes

If you have any questions, or want to get attention for a PR or issue please reach out on the #logging-and-metrics channel in the cloudfoundry slack