GCP Carbon Footprint integration

[dmathieu]

What does this PR do?

This adds a new integration, for GCP Carbon Footprint.

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

• Do not merge before GCP Carbon footprint metricset beats#34820 is shipped and released.

How to test this PR locally

Use elastic-package with beats running on a version where the new metricset is available.

Related issues

• Closes Collect Google Cloud Carbon Footprint #2039

Screenshots

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Build stats

• Start Time: 2023-06-06T15:00:06.832+0000

• Duration: 18 min 1 sec

Test stats 🧪

Test	Results
Failed	0
Passed	61
Skipped	0
Total	61

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🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (6/6)	💚
Files	100.0% (6/6)	💚 6.25
Classes	100.0% (6/6)	💚 6.25
Methods	88.991% (97/109)	👍 3.07
Lines	96.0% (1464/1525)	👍 10.075
Conditionals	100.0% (0/0)	💚

[endorama]

Just a small change, as the PR link in changelog is not correct :)

[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!

[dmathieu]

I will pick this up again once 8.8.0 is released and the related beats change is released.

[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!

[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!

[botelastic]

Hi! This PR has been stale for a while and we're going to close it as part of our cleanup procedure. We appreciate your contribution and would like to apologize if we have not been able to review it, due to the current heavy load of the team. Feel free to re-open this PR if you think it should stay open and is worth rebasing. Thank you for your contribution!