Calendar: Attribute classes/styles are printed twice

[ndiego]

Description

In the Editor, styles and classes generated by block attributes are generated twice for the Calendar block, once on the block wrapper and again on the server-side rendered component.

Up until recently, the Calendar block had no attributes other than className. Therefore, this bug was not much of an issue. However, as we start adding dimension and color support, issues emerge.

In the case of spacing controls, padding and margin get applied twice. Therefore we cannot implement this functionality without first fixing this issue.

Step-by-step reproduction instructions

1. Add a Calendar block.
2. Set a custom class. In the screenshot below I added table-class.
3. Confirm that this custom class is printed twice, once in the wrapper div, and then again on the div inside of the disabled component.

Screenshots, screen recording, code snippet

Environment info

• WordPress 6.0.1
• Gutenberg nightly

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes