refactor: migrate billing and test files to dependency injection pattern #5384

Job	Run time
build-and-check	2m 46s
test-packages/internal	48s
test-cli	1m 8s
test-packages/agent-runtime	1m 22s
test-packages/billing	48s
test-.agents	40s
test-integration-.agents	40s
test-common	39s
test-sdk	44s
test-integration-packages/agent-runtime	44s
test-web	49s
test-integration-sdk	42s
test-integration-web	40s
test-integration-packages/billing	43s
test-integration-packages/internal	35s
test-integration-cli	39s
test-integration-common	39s
	15m 6s

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