Part of #65338

All of our remaining usage of the ButtonGroup component is visually outdated as a segmented control and often inaccessibly implemented. We should correct this by replacing them with ToggleGroupControl.

How to submit PRs

To pick up a task, write your name by the checklist item or post a comment to this issue.

Please include before/after screenshots in the PR.

• packages/block-editor/src/components/image-size-control/index.js ImageSizeControls: Replace ButtonGroup with ToggleGroupControl #65386
• packages/block-library/src/button/edit.js - Button: Replace ButtonGroup usage with ToggleGroupControl #65346
• packages/block-editor/src/hooks/layout.js - updates LayoutTypeSwitcher to use ToggleGroupControl #65498
• packages/block-library/src/search/edit.js - Search: Replace ButtonGroup usage with ToggleGroupControl #65340