[Data] Update esaggs function to use count aggregation by default

[dokmic]

Summary

This pull-request resolves #67525 by providing the default value for the aggs argument. Apart from that, it fixes the data table element in canvas to use column id instead of the column name since the name and id returned by the esaggs function are different.

Previously, the esaggs function didn't work without providing at least one value in the aggs argument. That bug was caused by an incorrect default value which was an empty array. The updated default value should not break any of the existing expressions since that wasn't working before.

The change can be tested in canvas using the following expression:

esaggs index={indexPatternLoad id="..."}
| render

Checklist

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

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[elasticmachine]

Pinging @elastic/kibana-app-services (Team:AppServices)

[elasticmachine]

Pinging @elastic/kibana-presentation (Team:Presentation)

[ppisljar]

code LGTM

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: e2d291d
• Storybooks Preview

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
canvas	1.6MB	1.6MB	+25.0B

Page load bundle

Size of the bundles that are downloaded on every page load. Target size is below 100kb

id	before	after	diff
data	775.6KB	775.8KB	+265.0B

History

• 💚 Build #148690 succeeded f8a6803fd1929cc4c90d295c45f78b3391570218
• 💔 Build #148639 failed bf8caa32b15c84b51f6a5f4de190e9ed220a0dac

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

[poffdeluxe]

Changes on Canvas LGTM