Remove ipv6 cidr blocks from all the security groups in network module

[AmitPhulera]

Removing the cidr blocks for ipv6 entries as part of cleanup of the network module.

Ran cchq staging terraform plan, got

 # module.network.aws_security_group.alb-sg will be updated in-place
  ~ resource "aws_security_group" "alb-sg" {
        id                     = "sg-0e7192eb2cb7907e5"
      ~ ingress                = [
          - {
              - cidr_blocks      = [
                  - "0.0.0.0/0",
                ]
              - description      = ""
              - from_port        = 443
              - ipv6_cidr_blocks = [
                  - "::/0",
                ]
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 443
            },
          - {
              - cidr_blocks      = [
                  - "0.0.0.0/0",
                ]
              - description      = ""
              - from_port        = 80
              - ipv6_cidr_blocks = [
                  - "::/0",
                ]
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 80
            },
          - {
              - cidr_blocks      = [
                  - "10.201.0.0/16",
                ]
              - description      = ""
              - from_port        = 0
              - ipv6_cidr_blocks = []
              - prefix_list_ids  = []
              - protocol         = "-1"
              - security_groups  = []
              - self             = false
              - to_port          = 0
            },
          + {
              + cidr_blocks      = [
                  + "0.0.0.0/0",
                ]
              + description      = ""
              + from_port        = 443
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 443
            },
          + {
              + cidr_blocks      = [
                  + "0.0.0.0/0",
                ]
              + description      = ""
              + from_port        = 80
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 80
            },
          + {
              + cidr_blocks      = [
                  + "10.201.0.0/16",
                ]
              + from_port        = 0
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "-1"
              + security_groups  = []
              + self             = false
              + to_port          = 0
            },
        ]
        name                   = "alb-sg-staging"
        tags                   = {
            "Name" = "alb-sg-staging"
        }
        # (7 unchanged attributes hidden)

      - timeouts {}
    }

  # module.network.aws_security_group.elasticache will be updated in-place
  ~ resource "aws_security_group" "elasticache" {
        id                     = "sg-05981a4acb5d5d0fd"
      ~ ingress                = [
          - {
              - cidr_blocks      = [
                  - "10.201.10.0/24",
                  - "10.201.11.0/24",
                  - "10.201.12.0/24",
                  - "10.201.20.0/24",
                  - "10.201.21.0/24",
                  - "10.201.22.0/24",
                ]
              - description      = ""
              - from_port        = 6379
              - ipv6_cidr_blocks = [
                  - "::/0",
                ]
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 6379
            },
          + {
              + cidr_blocks      = [
                  + "10.201.10.0/24",
                  + "10.201.11.0/24",
                  + "10.201.12.0/24",
                  + "10.201.20.0/24",
                  + "10.201.21.0/24",
                  + "10.201.22.0/24",
                ]
              + description      = ""
              + from_port        = 6379
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 6379
            },
        ]
        name                   = "elasticache-staging"
        tags                   = {
            "Name" = "elasticache-staging"
        }
        # (7 unchanged attributes hidden)

      - timeouts {}
    }

  # module.network.aws_security_group.rds will be updated in-place
  ~ resource "aws_security_group" "rds" {
        id                     = "sg-0b811c0b4425b9ab7"
      ~ ingress                = [
          - {
              - cidr_blocks      = [
                  - "10.201.10.0/24",
                  - "10.201.11.0/24",
                  - "10.201.12.0/24",
                  - "10.201.40.0/24",
                  - "10.201.41.0/24",
                  - "10.201.42.0/24",
                ]
              - description      = ""
              - from_port        = 5432
              - ipv6_cidr_blocks = [
                  - "::/0",
                ]
              - prefix_list_ids  = []
              - protocol         = "tcp"
              - security_groups  = []
              - self             = false
              - to_port          = 5432
            },
          + {
              + cidr_blocks      = [
                  + "10.201.10.0/24",
                  + "10.201.11.0/24",
                  + "10.201.12.0/24",
                  + "10.201.40.0/24",
                  + "10.201.41.0/24",
                  + "10.201.42.0/24",
                ]
              + description      = ""
              + from_port        = 5432
              + ipv6_cidr_blocks = []
              + prefix_list_ids  = []
              + protocol         = "tcp"
              + security_groups  = []
              + self             = false
              + to_port          = 5432
            },
        ]
        name                   = "rds-staging"
        tags                   = {
            "Name" = "rds-staging"
        }
        # (7 unchanged attributes hidden)

      - timeouts {}
    }

Will apply the changes by cchq terraform apply -target=module.network.aws_security_group.rds -target=module.network.aws_security_group.elasticache -target=module.network.aws_security_group.alb-sg

Environments Affected

Staging, India, Prod