[AWS][EBS] Add dimensions fields.

[constanca-m]

What does this PR do?

Add dimension fields to EBS datastream.

Details

Each EBS resource has a volume ID that is unique within a region in some account. This makes the combination (volume id, region, account) unique. There is no change in the number of documents after enabling TSDB:

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.

How to test this PR locally

Refer to #6061

Related issues

• Relates to [AWS][EBS] Enable TSDB support #6061

[elasticmachine]

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• Start Time: 2023-05-02T14:12:03.568+0000

• Duration: 57 min 31 sec

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Name	Metrics % (covered/total)	Diff
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[agithomas]

Can you please validate - if cloud.availability_zone be a dimension filed ?

Reference : https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-creating-volume.html , Step 8.

[elasticmachine]

Package aws - 1.34.0 containing this change is available at https://epr.elastic.co/search?package=aws