Addon API: Improve the updateStatus API

[ndelangen]

What I did

• add ability to remove via setting null
• add ability to update status via a state-setter-function

Checklist for Contributors

Testing

The changes in this PR are covered in the following automated tests:

• stories
• unit tests
• integration tests
• end-to-end tests

Manual testing

No manual tests are needed

Documentation

• Add or update documentation reflecting your changes
• If you are deprecating/removing a feature, make sure to update
  MIGRATION.MD

Checklist for Maintainers

• When this PR is ready for testing, make sure to add ci:normal, ci:merged or ci:daily GH label to it to run a specific set of sandboxes. The particular set of sandboxes can be found in code/lib/cli/src/sandbox-templates.ts
• [x Make sure this PR contains one of the labels below

🦋 Canary release

This pull request has been released as version 0.0.0-pr-24007-sha-c31c498a. Install it by pinning all your Storybook dependencies to that version.

More information

Published version	0.0.0-pr-24007-sha-c31c498a
Triggered by	@ndelangen
Repository	storybookjs/storybook
Branch	norbert/enhance-updateStatus
Commit	c31c498a
Datetime	Wed Aug 30 09:48:37 UTC 2023 (1693388917)
Workflow run	6023282677

To request a new release of this pull request, mention the @storybookjs/core team.

core team members can create a new canary release here or locally with gh workflow run --repo storybookjs/storybook canary-release-pr.yml --field pr=24007

[tmeasday]

LGTM!