refactor(OnyxTable): rename property `grid` to `withVerticalBorders`

[larsrickert]

Relates to #1266

Reviewer question: Should we also rename the striped property or is that fine?

We got feedback that the property name grid might be mixed up with the "real" grid so we rename it here

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[changeset-bot[bot]]

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Latest commit: f93dbb226e0831b947201cc1c58ef8cd26036781

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 7 packages

| Name | Type | | ------------------------- | ----- | | sit-onyx | Major | | alpha-test-app | Patch | | playground | Patch | | @sit-onyx/chartjs-plugin | Major | | @sit-onyx/nuxt | Major | | @sit-onyx/storybook-utils | Major | | @sit-onyx/vitepress-theme | Major |

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