Show TSVB and Agg based as "legacy" when users create a visualization from the library

[teresaalvarezsoler]

Problem
Currently, we don't have a way to discourage user from creating TSVB and Agg based visualizations. We should let users know that TSVB and Agg based will be deprecated in the future so they can choose Lens or ESQL visualizations instead.

Solution
Show TSVB and Agg based as "legacy" like we do in the Dashboards. Needs design @MichaelMarcialis

[elasticmachine]

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

[MichaelMarcialis]

The latest Figma design mockups for this issue have been crafted and are ready for handoff to engineering. Some key screenshots from the mockups can be found below. Please view the full Figma document for all mockups and developer notes.

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[markov00]

@teresaalvarezsoler @MichaelMarcialis should we provide the deprecation message also within the various editors?
I believe we should right? Michael could you provide a quick design for that if Teresa agree?
Thanks

[markov00]

@MichaelMarcialis I've discussed with Teresa and the current Legacy tooltip should be a bit more vague "are scheduled for deprecation in the future" or something along those lines.

At a later stage, we are going to:

• show an icon/text in the deprecated dashboard panels saying that we are deprecating the viz
• add the deprecation message inside the editor
• add a way to convert or support the migration to Lens

[markov00]

@florent-leborgne @gvnmagni it will be great if you folks could craft a better text to describe the various editors. We can make this modal shine and convince more users to switch to Lens if we have better warding here.
Thanks

[florent-leborgne]

@markov00 I think the current approach already discourages from going with the legacy ones.
Maybe we can still:

• reinforce the messaging on the Legacy pane by adding somewhere that Lens provides these features and even more, with a link to switch back to it instead?
• rework the text of the Lens card to insist that this is the best and most complete editor available there? Maybe we can reinforce the way it looks visually as well

I'm not sure if it's worth revisiting the texts on all other cards as they are rather factual and specific, unless you have a particular idea in mind?