default to id if provider_id is missing for resource.id

[maxcold]

Proposed commit message

Ensuring resource.id is set for Cloud Configuration Finding data stream by defaulting to resource.id from the source data when resource.provider_id is missing

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

Run pipeline tests elastic-package test pipeline --data-streams cloud_configuration_finding

Related issues

• fixes https://github.com/elastic/security-team/issues/10811

Screenshots

[maxcold]

Included in elastic#11414