feat: Add var service_tags

[leonardobiffi]

Description

Add the variable service_tags in the service module to configure individually when using the module directly

Motivation and Context

When using the service module directly, there is no option to set a specific tag for the service

Breaking Changes

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

  # module.ecs_service.aws_ecs_service.this[0] will be created
  + resource "aws_ecs_service" "this" {
      + cluster                            = (known after apply)
      + deployment_maximum_percent         = 200
      + deployment_minimum_healthy_percent = 66
      + desired_count                      = 1
      + enable_ecs_managed_tags            = true
      + enable_execute_command             = true
      + force_new_deployment               = true
      + iam_role                           = (known after apply)
      + id                                 = (known after apply)
      + launch_type                        = "FARGATE"
      + name                               = "ex-fargate"
      + platform_version                   = (known after apply)
      + scheduling_strategy                = "REPLICA"
      + tags                               = {
          + "Example"    = "ex-fargate"
          + "Name"       = "ex-fargate"
          + "Repository" = "https://github.com/terraform-aws-modules/terraform-aws-ecs"
          + "ServiceTag" = "Tag on service level"
        }
      + tags_all                           = {
          + "Example"    = "ex-fargate"
          + "Name"       = "ex-fargate"
          + "Repository" = "https://github.com/terraform-aws-modules/terraform-aws-ecs"
          + "ServiceTag" = "Tag on service level"
        }
      + task_definition                    = (known after apply)
      + triggers                           = (known after apply)
      + wait_for_steady_state              = false

      + load_balancer {
          + container_name   = "ecsdemo-frontend"
          + container_port   = 3000
          + target_group_arn = (known after apply)
        }

      + network_configuration {
          + assign_public_ip = false
          + security_groups  = (known after apply)
          + subnets          = (known after apply)
        }

      + service_connect_configuration {
          + enabled   = true
          + namespace = (known after apply)

          + service {
              + discovery_name = "ecsdemo-frontend"
              + port_name      = "ecsdemo-frontend"

              + client_alias {
                  + dns_name = "ecsdemo-frontend"
                  + port     = 3000
                }
            }
        }

      + timeouts {}
    }

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

git commit -m "add var service_tags"
Terraform fmt............................................................Passed
Terraform wrapper with for_each in module................................Passed
Terraform validate.......................................................Passed
Terraform docs...........................................................Passed
Terraform validate with tflint...........................................Passed
check for merge conflicts................................................Passed
fix end of files.........................................................Passed
[feat/service_tags da688aa] add var service_tags
 4 files changed, 9 insertions(+), 1 deletion(-)

[bryantbiggs]

Thank you!

[antonbabenko]

This PR is included in version 5.8.0 🎉

[github-actions]

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