[Fleet] added support for dimension field

[juliaElastic]

Summary

Closes #115620

Added support for dimension field.

In packages field definitions, a dimension is defined as a boolean value in a fields definition, for example:

- name: example.id
  type: keyword
  dimension: true

This should be translated into a mapping including the time_series_dimension parameter (added in elastic/elasticsearch#74014) set to true, something like this:

...
  "mappings": {
    "properties":
      "example":
        "properties":
          "id": {
            "type": "keyword",
            "time_series_dimension": true
          }
       }
    }
...

Checklist

• Unit or functional tests were updated or added to match the most common scenarios

[elasticmachine]

Pinging @elastic/fleet (Team:Fleet)

[nchaulet]

🚀

[kibana-ci]

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Metrics [docs]

✅ unchanged

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[juliaElastic]

manual test case here: #115620 (comment)