move request-files-prompt to agent-runtime #3926

Job	Run time
build-and-check	2m 30s
test-integration-common	35s
test-integration-.agents	27s
test-integration-backend	38s
test-integration-npm-app	39s
test-integration-packages/agent-runtime	31s
test-common	40s
test-integration-cli	30s
test-cli	32s
test-integration-web	36s
test-backend	2m 16s
test-npm-app	41s
test-packages/agent-runtime	30s
test-.agents	31s
test-web	36s
	12m 12s

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