VideoPress: Insert v6 block for VideoPress videos on Gutenberg Inserter Media tab

This is part of an idea to improve the VideoPress experience inside the new Media tab on the Gutenberg Inserter.

- when a VideoPress video is selected, a videopress/video block should be created
- currently, a `core/video` is inserted, what results on
- different experiences for Jetpack plugin users vs. VideoPress standalone plugin users (v5 block vs. pure core video block)
- the user not having access to the full functionalities of the VideoPress block

Notes:

- this feature depends on the Inserter Media tab becoming extensible. More info on pe4Cmx-LC-p2.

This issue is related to #28651.

Start with the Gutenberg Inserter Media tab extensibility described in pe4Cmx-LC-p2 and compare the current core/video insertion path with the VideoPress v6 block behavior. Done means selecting a VideoPress video creates videopress/video and exposes its full functionality consistently for Jetpack and standalone users; review related issue #28651.

Written by the indexing model from the issue text.