0.20.0 Add support for "capacity_provider_strategy"

what

• Add support for "capacity_provider_strategy"

why

• Reduce costs by specifying different capacity_provider

Example configuration for FARGATE_SPOT to reduce ECS Fargate workloads costs

capacity_provider_strategies = [
    {
      capacity_provider = "FARGATE_SPOT"
      weight            = 3
      base              = null
    },
    {
      capacity_provider = "FARGATE"
      weight            = 1
      base              = null
    }
]