feat!: Upgrade AWS provider and min required Terraform version to `6.0` and `1.5.7` respectively #284

Job	Run time
Collect workflow inputs	4s
Max TF pre-commit	1m 5s
Min TF pre-commit (.)	23s
Min TF pre-commit (./examples/complete)	25s
Min TF pre-commit (./examples/fargate)	24s
Min TF pre-commit (./modules/cluster)	24s
Min TF pre-commit (./examples/ec2-autoscaling)	25s
Min TF pre-commit (./modules/container-definition)	26s
Min TF pre-commit (./modules/service)	24s
	4m 0s

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