refactor: replace `samversion` with `sam_asset` #184

Job	Run time
permission_check	1s
prepare_matrix	13s
test-integration (./modules/forwarder)	2m 37s
test-integration (./modules/logwriter)	2m 18s
test-integration (./modules/config)	22s
test-integration (./modules/stack)	4m 35s
test-integration (./modules/metricstream)	1m 35s
test-integration (./modules/configsubscription)	1m 4s
test-integration (./examples/stack-http)	2m 33s
test-integration (./examples/simple)	1m 56s
test-integration (./examples/forwarder-sns)	2m 28s
test-integration (./examples/logwriter-manual-subscription)	1m 25s
test-integration (./examples/logwriter-auto-subscription)	2m 35s
test-integration (./examples/forwarder-kms)	2m 30s
test-integration (./examples/stack-filedrop)	2m 24s
cleanup	11s
	28m 47s

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