Add features support to rust programs in mozbuild#397

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jonathanmendez wants to merge 3 commits intoenterprise-mainfrom

jmendez/rustprogram-features

Commits on Feb 3, 2026

Add features to [Host]RustProgram objects and moz.build definitions
jonathanmendez
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Handle Rust program features in the recursivemake backend
jonathanmendez
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Add tests for Rust program features, frontend and backend
jonathanmendez
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