Fixed schema for global styles REST API endpoint `wp/v2/global-styles/{id}`

[narenin]

Trac ticket: https://core.trac.wordpress.org/ticket/61911

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Props narenin, johnbillion, timothyblynjacobs, audrasjb.

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[johnbillion]

@narenin Thanks for the PR. int isn't a valid type in JSON schema.

[narenin]

@johnbillion Thanks for the review, I have updated the same to integer, please check.

[TimothyBJacobs]

This is slightly weird because the value does have a sanitize_callback registered for it which calls urldecode, which seems like an indication that the value is supposed to be a string. Are we sure this is supposed to be an integer? If so, we should probably also be removing the sanitize_callback.

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We'd probably also want to update the regex to use \d+ instead of \w-

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Sneaky edit 2, yeah it's definitely expecting a post id. So yeah I think this conceptually makes sense, we just need to make a few more changes.

[narenin]

Thanks @johnbillion @TimothyBJacobs for your feedback's, I have implemented the same, could you please take a look.

[audrasjb]

@johnbillion @TimothyBJacobs are you available to review the edited PR? Thanks!

[johnbillion]

@narenin Want to take a look at these failing unit tests?

[johnbillion]

Closing this in favour of #8585 which is more comprehensive. Thanks!