VTag improvements

[obulat]

Fixes

Fixes #3190 by @dhruvkb

This PR is the updated version of #3870 by @Stagge

Description

The VTag component added in #3137 has been improved in the following ways:

• All props are forwarded to the inner VButton (and the VLink component)
• All events are emitted from the inner VButton
• The content is displayed with a slot for the content instead of a prop.
• Accessible labels to the links have been added to clearly indicate that the link is a tag. The a11y group advised not to add aria-labels, and use the inner text instead
• Tests for the VTag component has been added.

Testing Instructions

Run the frontend app using just frontend/run dev
Go to http://localhost:8443/preferences and switch the additional_search_views flag on.
Go to the homepage and search for something, then select one of the results. You should see the tags work as expected.

There are no visual changes, so the VR tests pass.

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.
• I ran the DAG documentation generator (if applicable).

Developer Certificate of Origin

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[zackkrida]

I think the tests could use some cleanup but that it isn't blocking.

[dhruvkb]

LGTM, I just have a doubt.

[dhruvkb]

Why were these added?

[obulat]

Normally, these should just pass through, but I think because we use 2 levels of components here: VButton that is as VLink, they are not being passed without these.