Add key modifiers to MouseAction and add them to state

[mariairiartef]

Summary

Details

Issues

Checklist

• The proper chart type label has been added (e.g. :xy, :partition)
• The proper feature labels have been added (e.g. :interactions, :axis)
• All related issues have been linked (i.e. closes #123, fixes #123)
• New public API exports have been added to packages/charts/src/index.ts
• Unit tests have been added or updated to match the most common scenarios
• The proper documentation and/or storybook story has been added or updated
• The code has been checked for cross-browser compatibility (Chrome, Firefox, Safari, Edge)
• Visual changes have been tested with light and dark themes

[elastic-datavis]

⏳ Pending Deployment (build#4692) - 70401bd

• ⏳ Storybook
• ⏳ e2e server
• ⏳ Playwright report