refactor: migrate billing and test files to dependency injection pattern #5443

Job	Run time
build-and-check	2m 33s
test-integration-common	46s
test-cli	1m 11s
test-integration-cli	39s
test-common	39s
test-integration-packages/billing	37s
test-integration-web	41s
test-integration-.agents	40s
test-integration-sdk	38s
test-integration-packages/agent-runtime	36s
test-packages/billing	44s
test-packages/internal	45s
test-integration-packages/internal	45s
test-web	42s
test-.agents	38s
test-packages/agent-runtime	52s
test-sdk	43s
	14m 9s

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