Tiled Gallery Block: add option to disable all Tiled Galleries and revert all existing galleries to classic gallery blocks

#### Is your feature request related to a problem? Please describe.

You no can revert the tiled gallery in Gutenberg to standard wordpress gallery, you need make it by hand, one by one
And you no can use Tiled Gallery without the CDN (also if you no enable the CDN images)
People who use the new tiled gallery no know that is different to the old tiled.
And I think, how I no enable the site accelerator images and script files, tiled gallery will use my server images,
So you never enabled the CDN but Tiled gallery use it, and if you want no use more the tiled gallery, you need replace it by hand, that was my problem.

#### Describe the solution you'd like

This is one easy solution
I want 2 options in wordpress media or jetpack desk:
One option is for transform the standard gallery to tiled gallery and choice (mosaic, circle, etc)
Other option is for use or no CDN images, use CDN or use the different standard size images, small medium large
Can be another extra option for transform the actual tiled gallery to standard wordpress gallery and no replace it by hand one by one.

#### Describe alternatives you've considered

One alternative necessary is one buton in jetpack desk for revert the tiled gallery in gutenberg to standard wordpress gallery, something we lost from the old tiled gallery (and was great because you no broke your wordpress galleries).

#### Additional context

And now the gutenberg is the standard in wordpress, no many users use the classic editor.
You are ingeneer but no think like one user...
The idea is make Wordpress easy, I am System Analyst and like ergonomics, I like to contribute with jetpack and wordpress, :)

Thank you and have a nice day!

The issue names Gutenberg, WordPress media, and the Jetpack dashboard as entry points. Start by tracing the existing Tiled Gallery controls and clarify how disabling the gallery, choosing CDN behavior, and converting existing galleries should work. Done means the scope and acceptance criteria for these options are explicit.

Written by the indexing model from the issue text.