[8.x](backport #41097) [vSphere] Add id field to all the metricsets

[mergify[bot]]

Description

Added id field to all the metricsets.

Checklist

• [X] My code follows the style guidelines of this project
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have made corresponding changes to the documentation
• [x] I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

Related issues

• Closes https://github.com/elastic/obs-integration-team/issues/73

---

This is an automatic backport of pull request #41097 done by [Mergify](https://mergify.com).

[mergify[bot]]

This pull request has not been merged yet. Could you please review and merge it @niraj-elastic? 🙏

[shmsr]

@kush-elastic Are there any PRs (related to vsphere) pending to backport to 8.x before this? I hope the order is maintained else it'd a pain later to fix the conflicts.

[kush-elastic]

@kush-elastic Are there any PRs (related to vsphere) pending to backport to 8.x before this? I hope the order is maintained else it'd a pain later to fix the conflicts.

No, all the previous PRs are already backported to 8.x.