Add missing version for class properties and methods

[mukeshpanchal27]

Trac ticket: https://core.trac.wordpress.org/ticket/64897

Use of AI Tools

N/A

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[github-actions]

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[t-hamano]

Thanks for catching this!

I noticed that the WP_REST_Icons_Controller class is also missing the @since tag. Should we address that in a separate PR?