[AWS] Add missing endpoint config to AWS metrics datasets

[legoguy1000]

What does this PR do?

Add the missing endpoint config to metrics datasets.

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

Related issues

• Closes [AWS] Endpoint config option does not update in agent policy #3776

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• Start Time: 2022-07-26T15:02:31.020+0000

• Duration: 38 min 49 sec

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Test	Results
Failed	0
Passed	332
Skipped	0
Total	332

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (11/11)	💚
Files	91.667% (11/12)	👎 -5.432
Classes	91.667% (11/12)	👎 -5.432
Methods	82.692% (172/208)	👎 -6.639
Lines	92.894% (2157/2322)	👍 2.313
Conditionals	100.0% (0/0)	💚