[cloud_security_posture] Add missing ECS orchestrator fields

[amirbenun]

Proposed commit message

Cloudbeat sends a few orchestrator.* ECS compliant fields.
Their declaration is required for being properly indexed to elasticsearch.

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

Screenshots

[elasticmachine]

💚 Build Succeeded

the below badges are clickable and redirect to their specific view in the CI or DOCS

Expand to view the summary

Build stats

• Start Time: 2023-12-13T09:38:12.315+0000

• Duration: 15 min 40 sec

Test stats 🧪

Test	Results
Failed	0
Passed	4
Skipped	0
Total	4

🤖 GitHub comments

Expand to view the GitHub comments

To re-run your PR in the CI, just comment with:

• /test : Re-trigger the build.

[elasticmachine]

🌐 Coverage report

Name	Metrics % (covered/total)	Diff
Packages	100.0% (0/0)	💚
Files	100.0% (0/0)	💚 15.385
Classes	100.0% (0/0)	💚 15.385
Methods	25.0% (2/8)	👎 -64.831
Lines	100.0% (0/0)	💚 10.785
Conditionals	100.0% (0/0)	💚

[elasticmachine]

Package cloud_security_posture - 1.8.0-preview02 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.8.0-preview03 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.8.0-preview04 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.8.0-preview05 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.8.0-preview06 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.8.0-preview07 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.8.0-preview08 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture

[elasticmachine]

Package cloud_security_posture - 1.8.0 containing this change is available at https://epr.elastic.co/search?package=cloud_security_posture