Fix free-tier credit overdraw and consumeFromOrderedGrants debt accou… #6090

Job	Run time
build-and-check	3m 0s
test-integration-packages/billing	1m 6s
test-integration-packages/internal	1m 3s
test-integration-web	38s
test-integration-sdk	1m 22s
test-integration-common	43s
test-integration-cli	43s
test-cli	56s
test-packages/agent-runtime	50s
test-packages/internal	56s
test-integration-packages/agent-runtime	38s
test-common	39s
test-.agents	39s
test-sdk	48s
test-web	47s
test-packages/billing	50s
	15m 38s

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