[ES|QL] Comments inside lists

[vadimkibana]

Summary

Partially addresses #194385

Adds support for:

• Comment parsing inside list literals.
• Attachment of the comments to the right list members.
• Pretty-printing of comments inside list literals.

For example the below comments inside a list literal will be: (1) parsed out; (2) attached to the correct list members; (3) pretty printed:

ROW [
  // cmt
  /* cmt */
  /* cmt */ 1, /* cmt */ // cmt
  2,
  3
]

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-esql (Team:ESQL)

[stratoula]

LGTM!

[elasticmachine]

💛 Build succeeded, but was flaky

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• Commit: daf4cce

Failed CI Steps

• FTR Configs #66

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	3.4MB	3.4MB	+116.0B

History

• 💚 Build #241440 succeeded 4faeb43