refactor: migrate billing and test files to dependency injection pattern #5447

Job	Run time
build-and-check	2m 30s
test-integration-cli	41s
test-integration-packages/agent-runtime	45s
test-integration-common	46s
test-integration-.agents	46s
test-packages/agent-runtime	57s
test-integration-packages/billing	39s
test-cli	1m 10s
test-packages/internal	52s
test-sdk	43s
test-common	47s
test-integration-sdk	40s
test-.agents	38s
test-web	42s
test-integration-web	45s
test-packages/billing	45s
test-integration-packages/internal	42s
	14m 48s

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