[8.x] [code-owners] Add area information to code owner entries (#205143)

[kibanamachine]

Backport

This will backport the following commits from main to 8.x:

• [code-owners] Add area information to code owner entries (#205143)

Questions ?

Please refer to the Backport tool documentation

[elasticmachine]

💚 Build Succeeded

• Buildkite Build
• Commit: ad66806

Metrics [docs]

Public APIs missing comments

Total count of every public API that lacks a comment. Target amount is 0. Run node scripts/build_api_docs --plugin [yourplugin] --stats comments for more detailed information.

id	before	after	diff
@kbn/code-owners	5	11	+6

Unknown metric groups

API count

id	before	after	diff
@kbn/code-owners	12	22	+10

cc @dolaru