refactor: Merged DhService with DhcService

[bmingles]

This PR consolidates DhService with DhcService. There shouldn't be any functional changes.

[github-actions]

End-to-end Test Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Pending ⏳	Other ❓	Flaky 🍂	Duration ⏱️
6	6	0	0	0	0	0	04:52:28

A ctrf plugin

Detailed Test Results

Name	Status	ms	Flaky 🍂
should default to the correct settings	passed ✅	1907
should return custom settings: Empty configs	passed ✅	160
should return custom settings: Populated configs	passed ✅	116
should be able to load VSCode	passed ✅	1081
should only be visible when a supported file type is active: test.groovy	passed ✅	2584
should only be visible when a supported file type is active: test.py	passed ✅	980

A ctrf plugin

Failed Test Summary

No failed tests ✨

Flaky Test Summary

No flaky tests detected. ✨