BaseControl: Update Prop docs

[Mayank-Tripathi32]

Fixes #70063

What?

Closes #70063

This PR fixes the documentation for the BaseControl component to clarify that it doesn't support the as prop, while its VisualLabel subcomponent does.

Why?

The prop docs for the BaseControl component incorrectly suggested that it takes an as prop due to the prop type definition. However, in reality, the as prop is not passed down to the internal wrapper component. This PR updates the documentation to correctly reflect the component's behavior.

How?

• Fixed type in the BaseControl component and regenerated the README.md
• Added an entry in the CHANGELOG.md file to document this documentation fix

Testing Instructions

1. Check the updated type in packages/components/src/base-control/index.tsx
2. Verify that the CHANGELOG.md entry correctly describes the fix
3. After the documentation is regenerated, verify that the BaseControl component's README.md correctly states that it doesn't support the as prop

Testing Instructions for Keyboard

Not applicable as this is a documentation-only change.

Screenshots or screencast

Not applicable as this is a documentation-only change.

[Infinite-Null]

Hi @Mayank-Tripathi32, I looked into this and ran the build script on trunk everything seems to work well, Then I checkout into your PR and ran the build command it failed and failed specifically on type build then I remove your type change back to props: WordPressComponentProps< BaseControlProps, null >, The build was successful.

I think the Build is failing because of the type change in your PR.

[github-actions]

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Co-authored-by: Mayank-Tripathi32 <mayanktripathi32@git.wordpress.org>
Co-authored-by: Infinite-Null <ankitkumarshah@git.wordpress.org>
Co-authored-by: mirka <0mirka00@git.wordpress.org>

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[github-actions]

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