feat: Update to use aws_partition for AWS China (aws-cn) compatibility #393

Job	Run time
Get root directories	3s
Module max TF version	7s
Min TF validate (.)	25s
Min TF validate (./modules/externalrole)	26s
Min TF validate (./modules/forwarder)	22s
Min TF validate (./modules/stack)	15s
Min TF validate (./modules/testing/setup)	18s
Min TF validate (./modules/testing/sqs_queue)	13s
Min TF validate (./modules/testing/s3_bucket)	13s
Min TF validate (./modules/testing/exec)	12s
Min TF validate (./modules/cloudtrail)	18s
Min TF validate (./modules/subscriber)	17s
Min TF validate (./modules/config)	17s
Min TF validate (./modules/metricstream)	22s
Min TF validate (./modules/configsubscription)	16s
Min TF validate (./modules/sam_asset)	21s
Min TF validate (./modules/logwriter)	18s
Min TF validate (./infrastructure)	18s
Min TF validate (./examples/forwarder-s3)	22s
Min TF validate (./examples/logwriter-manual-subscription)	21s
Min TF validate (./examples/forwarder-kms)	18s
Min TF validate (./examples/simple)	27s
Min TF validate (./examples/stack-filedrop)	19s
Min TF validate (./examples/forwarder-sns)	18s
Min TF validate (./examples/stack-http)	20s
Min TF validate (./examples/logwriter-auto-subscription)	17s
Max TF pre-commit (1.9.8)	3m 8s
	10m 51s

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