fix: refactor: clean up apollo_federation::compile_service #22180

Job	Run time
Check if Build	3s
Test AWS Lambda Build	2m 45s
Run Tests (WASM)	46s
Check Examples	55s
Draft Release	0s
Run Tests (Cloudflare)	3m 9s
Outputs matrix used for cross compilation / setup-matrix	12s
Run Tests on linux-x64-gnu	1m 6s
Run Tests on linux-x64-musl	3m 9s
Run Tests on linux-arm64-gnu	3m 38s
Run Tests on linux-arm64-musl	3m 15s
Run Tests on linux-ia32-gnu	3m 10s
Run Tests on darwin-arm64	4m 48s
Run Tests on darwin-x64	3m 22s
Run Tests on win32-x64-msvc	11m 16s
Run Tests on win32-arm64-msvc	2m 38s
Run Tests on win32-ia32-msvc	12m 15s
Release (AWS Lambda)	0s
Release	0s
build-and-push-image	0s
Semantic Release	0s
Publish NPM main package	0s
Homebrew Release	0s
	56m 27s

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