feat: Default action forward action type

[michaelact]

Description

feat: default-action forward action type

Motivation and Context

AWS Code Deploy Blue/Green Deployment automatically register 2 target group for 1 application. The first one is blue target group, and the other is green target group.

Breaking Changes

No.

How Has This Been Tested?

• I have updated at least one of the examples/* to demonstrate and validate my change(s)
• I have tested and validated these changes using one or more of the provided examples/* projects

• I have executed pre-commit run -a on my pull request

  http_tcp_listeners = [
    {
      port     = 80
      protocol = "HTTP"
      action_type = "forward"
      forward = {
        target_groups = [
          {
            target_group_index = 0
            weight             = 100
          },
          {
            target_group_index = 1
            weight             = 0
          }
        ]
      }
    }
  ]

[antonbabenko]

This PR is included in version 8.4.0 🎉

[michaelact]

Thanks @antonbabenko

[github-actions]

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