[AWS] Add include_linked_accounts parameter for all metrics data streams

[kaiyan-sheng]

What does this PR do?

This PR is to add include_linked_accounts config parameter into all metrics data streams. This parameter is added into Metricbeat in elastic/beats#35648.

Checklist

• I have reviewed tips for building integrations and this pull request is aligned with them.
• I have verified that all data streams collect metrics or logs.
• I have added an entry to my package's changelog.yml file.
• I have verified that Kibana version constraints are current according to guidelines.

Screenshots

Default looks like this:

Config Include Linked Accounts is default to false for now.

With the Include Linked Accounts toggle enabled, the agent policy looks like this:

inputs:
  - id: aws/metrics-ec2-abc724c0-0558-11ee-bd26-592a7049951d
    name: aws-1
    revision: 2
    type: aws/metrics
    use_output: default
    meta:
      package:
        name: aws
        version: 1.41.0
    data_stream:
      namespace: default
    package_policy_id: abc724c0-0558-11ee-bd26-592a7049951d
    streams:
      - id: aws/metrics-aws.ec2_metrics-abc724c0-0558-11ee-bd26-592a7049951d
        data_stream:
          dataset: aws.ec2_metrics
          type: metrics
        access_key_id: foo
        period: 5m
        tags_filter: null
        metricsets:
          - cloudwatch
        secret_access_key: boo
        include_linked_accounts: true
        metrics:
          - name:
              - CPUUtilization
              - CPUCreditUsage
              - CPUCreditBalance
              - CPUSurplusCreditBalance
              - CPUSurplusCreditsCharged
              - StatusCheckFailed
              - StatusCheckFailed_Instance
              - StatusCheckFailed_System
            statistic:
              - Average
            namespace: AWS/EC2
            resource_type: 'ec2:instance'
          - name:
              - DiskReadBytes
              - DiskReadOps
              - DiskWriteBytes
              - DiskWriteOps
              - NetworkIn
              - NetworkPacketsIn
              - NetworkOut
              - NetworkPacketsOut
            statistic:
              - Sum
            namespace: AWS/EC2
            resource_type: 'ec2:instance'

I tested it with the config above and it does collect metrics from both monitoring account and linked source account:

[elasticmachine]

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• Start Time: 2023-06-09T11:49:48.033+0000

• Duration: 52 min 10 sec

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Total	194

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[elasticmachine]

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (15/15)	💚
Files	93.75% (15/16)	👎 -6.25
Classes	93.75% (15/16)	👎 -6.25
Methods	85.921% (238/277)	👎 -12.71
Lines	85.925% (7387/8597)	👎 -8.431
Conditionals	100.0% (0/0)	💚

[zmoog]

LGTM 👏

[elasticmachine]

Package aws - 1.43.0 containing this change is available at https://epr.elastic.co/search?package=aws