[ES|QL] Improve column parsing

[vadimkibana]

Summary

Fixes #189913

• Adds parts field to { type: 'column' } AST nodes. The parts field contains a list of correctly parsed out column framents.
• The existing text and name fields work only if a column does not have any escaped characters. However, I could not change/remove them, as lots of code is currently referring them.

Checklist

Delete any items that are not applicable to this PR.

• 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-data-discovery (Team:DataDiscovery)

[elasticmachine]

Pinging @elastic/kibana-esql (Team:ESQL)

[vadimkibana]

@elasticmachine merge upstream

[drewdaemon]

LGTM

[vadimkibana]

@elasticmachine merge upstream

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 59a9de7

Metrics [docs]

Page load bundle

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

id	before	after	diff
kbnUiSharedDeps-srcJs	3.3MB	3.3MB	+386.0B

Unknown metric groups

API count

id	before	after	diff
@kbn/esql-ast	149	150	+1

References to deprecated APIs

id	before	after	diff
@kbn/esql-validation-autocomplete	0	2	+2

History

• 💔 Build #228489 failed d45b105
• 💛 Build #228143 was flaky b7b580e
• 💔 Build #228124 failed c2c9a14
• 💔 Build #227944 failed fcbba22

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