fix(billing): update test mocks for AdvisoryLockTransactionResult ret… #5523

Job	Run time
build-and-check	2m 36s
test-integration-packages/billing	1m 12s
test-integration-sdk	49s
test-integration-common	52s
test-integration-cli	53s
test-integration-packages/agent-runtime	55s
test-integration-web	55s
test-cli	1m 18s
test-integration-packages/internal	2m 7s
test-packages/agent-runtime	1m 12s
test-packages/billing	58s
test-common	52s
test-packages/internal	1m 5s
test-sdk	52s
test-web	53s
test-.agents	54s
	18m 23s

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