Add back memo() and don't prop drill streamingAgents #5486

Job	Run time
build-and-check	2m 31s
test-integration-.agents	46s
test-common	34s
test-.agents	36s
test-cli	1m 22s
test-integration-packages/internal	46s
test-integration-packages/billing	47s
test-integration-packages/agent-runtime	44s
test-sdk	52s
test-integration-common	43s
test-integration-web	41s
test-packages/internal	49s
test-integration-cli	47s
test-packages/billing	39s
test-web	39s
test-packages/agent-runtime	1m 3s
test-integration-sdk	45s
	15m 4s

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