Add script to analyze subscription usage #5813

Job	Run time
build-and-check	2m 51s
test-integration-packages/billing	1m 2s
test-integration-packages/internal	1m 2s
test-integration-sdk	47s
test-.agents	45s
test-integration-cli	46s
test-cli	55s
test-integration-common	47s
test-integration-packages/agent-runtime	48s
test-packages/agent-runtime	47s
test-common	47s
test-packages/billing	45s
test-packages/internal	46s
test-web	49s
test-integration-web	43s
test-sdk	48s
	15m 8s

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