cloudprovider: update regions behavior for cloudwatch jobs

[tristanburgess]

This PR implements the Terraform changes needed to accommodate the breaking out of request and response models for CloudWatch scrape jobs. It supports the regionsSubsetOverride field on request, and the return of roleARN, regions, and regionsSubsetOverrideUsed on response.

regionsSubsetOverride not used (default account regions used)

scrape_job = {
  "aws_account_resource_id" = "2"
  "custom_namespace" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CoolMetric"
          "statistics" = toset([
            "Maximum",
            "Sum",
          ])
        },
      ])
      "name" = "CoolApp"
      "scrape_interval_seconds" = 300
    },
  ])
  "disabled_reason" = ""
  "enabled" = true
  "export_tags" = true
  "id" = "1:my-cloudwatch-scrape-job"
  "name" = "my-cloudwatch-scrape-job"
  "regions_subset_override" = toset([])
  "service" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CPUUtilization"
          "statistics" = toset([
            "Average",
          ])
        },
        {
          "name" = "StatusCheckFailed"
          "statistics" = toset([
            "Maximum",
          ])
        },
      ])
      "name" = "AWS/EC2"
      "resource_discovery_tag_filter" = tolist([
        {
          "key" = "k8s.io/cluster-autoscaler/enabled"
          "value" = "true"
        },
      ])
      "scrape_interval_seconds" = 300
      "tags_to_add_to_metrics" = toset([
        "eks:cluster-name",
      ])
    },
  ])
  "stack_id" = "1"
}
scrape_job_data = {
  "aws_account_resource_id" = "2"
  "custom_namespace" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CoolMetric"
          "statistics" = toset([
            "Maximum",
            "Sum",
          ])
        },
      ])
      "name" = "CoolApp"
      "scrape_interval_seconds" = 300
    },
  ])
  "disabled_reason" = ""
  "enabled" = true
  "export_tags" = true
  "id" = "1:my-cloudwatch-scrape-job"
  "name" = "my-cloudwatch-scrape-job"
  "regions" = toset([
    "ap-southeast-1",
    "eu-west-3",
    "us-east-2",
  ])
  "regions_subset_override_used" = false
  "role_arn" = "arn:aws:iam<removed for PR text>"
  "service" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CPUUtilization"
          "statistics" = toset([
            "Average",
          ])
        },
        {
          "name" = "StatusCheckFailed"
          "statistics" = toset([
            "Maximum",
          ])
        },
      ])
      "name" = "AWS/EC2"
      "resource_discovery_tag_filter" = tolist([
        {
          "key" = "k8s.io/cluster-autoscaler/enabled"
          "value" = "true"
        },
      ])
      "scrape_interval_seconds" = 300
      "tags_to_add_to_metrics" = toset([
        "eks:cluster-name",
      ])
    },
  ])
  "stack_id" = "1"
}

regionsSubsetOverride used

scrape_job = {
  "aws_account_resource_id" = "2"
  "custom_namespace" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CoolMetric"
          "statistics" = toset([
            "Maximum",
            "Sum",
          ])
        },
      ])
      "name" = "CoolApp"
      "scrape_interval_seconds" = 300
    },
  ])
  "disabled_reason" = "disabled_by_user"
  "enabled" = false
  "export_tags" = true
  "id" = "1:my-cloudwatch-scrape-job"
  "name" = "my-cloudwatch-scrape-job"
  "regions_subset_override" = toset([
    "eu-west-3",
    "us-east-2",
  ])
  "service" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CPUUtilization"
          "statistics" = toset([
            "Average",
          ])
        },
        {
          "name" = "StatusCheckFailed"
          "statistics" = toset([
            "Maximum",
          ])
        },
      ])
      "name" = "AWS/EC2"
      "resource_discovery_tag_filter" = tolist([
        {
          "key" = "k8s.io/cluster-autoscaler/enabled"
          "value" = "true"
        },
      ])
      "scrape_interval_seconds" = 300
      "tags_to_add_to_metrics" = toset([
        "eks:cluster-name",
      ])
    },
  ])
  "stack_id" = "1"
}
scrape_job_data = {
  "aws_account_resource_id" = "2"
  "custom_namespace" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CoolMetric"
          "statistics" = toset([
            "Maximum",
            "Sum",
          ])
        },
      ])
      "name" = "CoolApp"
      "scrape_interval_seconds" = 300
    },
  ])
  "disabled_reason" = "disabled_by_user"
  "enabled" = false
  "export_tags" = true
  "id" = "1:my-cloudwatch-scrape-job"
  "name" = "my-cloudwatch-scrape-job"
  "regions" = toset([
    "eu-west-3",
    "us-east-2",
  ])
  "regions_subset_override_used" = true
  "role_arn" = "arn:aws:iam<removed for PR text>"
  "service" = tolist([
    {
      "metric" = tolist([
        {
          "name" = "CPUUtilization"
          "statistics" = toset([
            "Average",
          ])
        },
        {
          "name" = "StatusCheckFailed"
          "statistics" = toset([
            "Maximum",
          ])
        },
      ])
      "name" = "AWS/EC2"
      "resource_discovery_tag_filter" = tolist([
        {
          "key" = "k8s.io/cluster-autoscaler/enabled"
          "value" = "true"
        },
      ])
      "scrape_interval_seconds" = 300
      "tags_to_add_to_metrics" = toset([
        "eks:cluster-name",
      ])
    },
  ])
  "stack_id" = "1"
}