isabel_brison 2b005a61ef Editor: add layout classes to legacy Group inner container.
Moves generated layout classes into the Group block inner container in classic themes, so that block gap support can work correctly.

Props flixos90, mukesh27.
Fixes #60130.

Built from https://develop.svn.wordpress.org/trunk@57246


git-svn-id: http://core.svn.wordpress.org/trunk@56752 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2024-01-08 06:13:20 +00:00
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