[AWS][cloudwatch_metrics] Enable TSDB by default for cloudwatch metrics data stream

[tetianakravchenko]

What does this PR do?

Enable TSDB by default for cloudwatch metrics data stream

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.

Author's Checklist

• [ ]

How to test this PR locally

tested with TSDB-migration-test-kit:

Testing data stream metrics-aws.cloudwatch_metrics-default.
Index being used for the documents is .ds-metrics-aws.cloudwatch_metrics-default-2023.08.04-000001.
Index being used for the settings and mappings is .ds-metrics-aws.cloudwatch_metrics-default-2023.08.04-000001.

The time series fields for the TSDB index are: 
        - dimension (4 fields):
                - agent.id
                - aws.dimensions.fingerprint
                - cloud.account.id
                - cloud.region
        - gauge (2 fields):
                - aws.ec2.metrics.CPUUtilization.avg
                - aws.ec2.metrics.CPUUtilization.max
        - routing_path (4 fields):
                - agent.id
                - aws.dimensions.fingerprint
                - cloud.account.id
                - cloud.region

Index tsdb-index-enabled successfully created.

Copying documents from .ds-metrics-aws.cloudwatch_metrics-default-2023.08.04-000001 to tsdb-index-enabled...
All 474 documents taken from index .ds-metrics-aws.cloudwatch_metrics-default-2023.08.04-000001 were successfully placed to index tsdb-index-enabled.

Related issues

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• Start Time: 2023-08-10T07:46:44.156+0000

• Duration: 53 min 49 sec

Test stats 🧪

Test	Results
Failed	0
Passed	206
Skipped	4
Total	210

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Name	Metrics % (covered/total)	Diff
Packages	100.0% (17/17)	💚
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Classes	94.444% (17/18)	👎 -1.01
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Package aws - 1.52.0 containing this change is available at https://epr.elastic.co/search?package=aws