change chunk types to use underscores #4073

Job	Run time
build-and-check	2m 54s
test-backend	49s
test-common	43s
test-npm-app	42s
test-packages/agent-runtime	1m 4s
test-cli	41s
test-web	1m 14s
test-.agents	42s
test-integration-backend	46s
test-integration-.agents	45s
test-integration-npm-app	51s
test-integration-common	41s
test-integration-packages/agent-runtime	44s
test-integration-cli	42s
test-integration-web	41s
	13m 59s

Provide feedback