feat: add externalrole module #220

Job	Run time
permission_check	1s
prepare_matrix	13s
test-integration (./examples/forwarder-kms)	2m 10s
test-integration (./examples/forwarder-s3)	2m 30s
test-integration (./examples/logwriter-auto-subscription)	2m 26s
test-integration (./examples/stack-http)	2m 27s
test-integration (./examples/simple)	1m 59s
test-integration (./examples/forwarder-sns)	2m 34s
test-integration (./examples/stack-filedrop)	2m 36s
test-integration (./examples/logwriter-manual-subscription)	1m 43s
test-integration (./modules/stack)	2m 49s
test-integration (./modules/logwriter)	2m 35s
test-integration (./modules/externalrole)	23s
test-integration (./modules/metricstream)	1m 43s
test-integration (./modules/config)	19s
test-integration (./modules/forwarder)	2m 54s
test-integration (./modules/configsubscription)	59s
cleanup	13s
	30m 34s

Provide feedback