k8s mappings added to process/alerts datastream to support new k8s da…

[mitodrummer]

…shboard

Change Summary

Issue: https://github.com/elastic/security-team/issues/4166

There are a number of fields which are new in 8.3, so i've commented out those 4 mappings until endpoint-package can point to 8.3 ECS.

Release Target

8.4

Q/A

For mapping changes:

• I ran make after making the schema changes, and committed any generated files (in schema/, generated/)

For Transform changes:

• The new transform successfully starts in Kibana
• The corresponding transform destination schema was updated if necessary

[elasticmachine]

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• Start Time: 2022-06-21T19:59:26.100+0000

• Duration: 7 min 25 sec

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[pzl]

@mitodrummer This looks good

Can you update the tests with sample values for the fields being added?

The sample files are:

• package/endpoint/data_stream/alerts/sample_event.json
• package/endpoint/data_stream/process/sample_event.json

[pzl]

lgtm