[7.x] [Lens] Value in legend (#101353)

[kibanamachine]

Backports the following commits to 7.x:

• [Lens] Value in legend ([Lens] Value in legend #101353)

[kibanamachine]

💚 Build Succeeded

• continuous-integration/kibana-ci/pull-request
• Commit: 15185a6
• Storybooks Preview
• Documentation Changes

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
lens	160	161	+1

Async chunks

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

id	before	after	diff
lens	1.3MB	1.3MB	+1.6KB

Unknown metric groups

API count

id	before	after	diff
lens	171	172	+1

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

cc @flash1293