Add cloud.account.name

[etiennep]

Fixes #1946

Changes

This PR adds a new cloud.account.name attributes which can be used to provide a human-readable alias or name for cloud accounts.

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Merge requirement checklist

• CONTRIBUTING.md guidelines followed.
• Change log entry added, according to the guidelines in When to add a changelog entry.
  • If your PR does not need a change log, start the PR title with [chore]
• [] schema-next.yaml updated with changes to existing conventions.