[TSVB] fix point visibility regression

[markov00]

Summary

fix https://github.com/elastic/kibana/issues/200255

The regression was caused by a breaking change introduced by elastic-charts around the area.points.visible style, that passed from a boolean to a union of 'always' | 'never' | 'auto';

[elasticmachine]

:yellow_heart: Build succeeded, but was flaky

• Buildkite Build
• Commit: 125b41aef57a1a4728c823123014ddf9313d8ead

Failed CI Steps

• x-pack/test_serverless/functional/test_suites/security/common_configs/config.group5.ts

Test Failures

• [job] [logs] x-pack/test_serverless/functional/test_suites/security/common_configs/config.group5.ts / discover/group6 discover sidebar field stats should work for regular and pinned filters

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
visTypeTimeseries	507.0KB	507.0KB	+17.0B

[elasticmachine]

Pinging @elastic/kibana-visualizations (Team:Visualizations)

[kibanamachine]

Starting backport for target branches: 8.16, 8.17, 8.x

https://github.com/elastic/kibana/actions/runs/12136701631

[kibanamachine]

💚 All backports created successfully

Status	Branch	Result
✅	8.16
✅	8.17
✅	8.x

Note: Successful backport PRs will be merged automatically after passing CI.

Questions ?

Please refer to the Backport tool documentation