[AWS] Migrate RDS metrics dashboard visualizations to lenses

[gpop63]

What does this PR do?

Migrates visualizations to lenses and adds input control groups.

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• 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.
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• Start Time: 2023-05-29T00:05:02.846+0000

• Duration: 54 min 13 sec

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[drewdaemon]

Let's change those two legacy metrics to Lens metrics and arrange them horizontally instead of vertically.

[botelastic]

Hi! We just realized that we haven't looked into this PR in a while. We're sorry! We're labeling this issue as Stale to make it hit our filters and make sure we get back to it as soon as possible. In the meantime, it'd be extremely helpful if you could take a look at it as well and confirm its relevance. A simple comment with a nice emoji will be enough :+1. Thank you for your contribution!

[gpop63]

Fixed:

[drewdaemon]

Thanks @gpop63 !

Sorry for the whiplash, but I think that in this case maybe the legacy metric makes more sense.

I still like the horizontal configuration of the panels, but we're dealing with so much space that the number is very far away from the label which isn't really how the new metric is supposed to be.

[drewdaemon]

Approving so as not to hold you up

[elasticmachine]

Package aws - 1.37.2 containing this change is available at https://epr.elastic.co/search?package=aws