Hide context-pruner in cli #4014

Job	Run time
build-and-check	2m 40s
test-common	36s
test-backend	30s
test-integration-.agents	30s
test-packages/agent-runtime	42s
test-cli	37s
test-npm-app	44s
test-web	33s
test-integration-cli	32s
test-integration-backend	44s
test-integration-npm-app	29s
test-integration-packages/agent-runtime	32s
test-integration-common	38s
test-integration-web	36s
test-.agents	31s
	10m 54s

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