refactor: migrate billing and test files to dependency injection pattern #5448

Job	Run time
build-and-check	2m 21s
test-packages/agent-runtime	58s
test-.agents	40s
test-integration-packages/billing	41s
test-common	36s
test-integration-common	39s
test-integration-cli	46s
test-web	50s
test-integration-sdk	39s
test-sdk	46s
test-integration-web	47s
test-integration-.agents	39s
test-integration-packages/agent-runtime	42s
test-packages/internal	53s
test-packages/billing	46s
test-integration-packages/internal	41s
test-cli	1m 8s
	14m 32s

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