l10n: Make percentage values ​​translatable

[t-hamano]

Description

Found this in the comment: https://github.com/WordPress/gutenberg/pull/65386#discussion_r1804243435

Percentage values ​​such as "100%" are not necessarily translated as "100%" depending on the language.

But in some places, these strings are hardcoded and cannot be translated.

I think we should make them translatable by using placeholders, like this:

/* translators: Percentage value. */
sprintf(
    __( '%s%' ),
    percentage
)

Here are the codes I found.

[!NOTE] Note that in each code, a ButtonGroup component is being replaced with a ToggleGroupControl component. After all these PRs are merged, it would be a good idea to localize all of the following in one PR.

ImageSizeControls component

https://github.com/WordPress/gutenberg/pull/65386

https://github.com/WordPress/gutenberg/blob/484c96035f521ff519afe7986c2199536a1e1485/packages/block-editor/src/components/image-size-control/index.js#L102

Search block

https://github.com/WordPress/gutenberg/pull/65340/

https://github.com/WordPress/gutenberg/blob/484c96035f521ff519afe7986c2199536a1e1485/packages/block-library/src/search/edit.js#L470

Button block

https://github.com/WordPress/gutenberg/pull/65346

https://github.com/WordPress/gutenberg/blob/484c96035f521ff519afe7986c2199536a1e1485/packages/block-library/src/button/edit.js#L140

Step-by-step reproduction instructions

N/A

Screenshots, screen recording, code snippet

No response

Environment info

No response

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

• [x] Yes

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

• [x] Yes

[AhmarZaidi]

Hey 👋, I'd like to work on this issue.