[bug#69637] [PATCH mesa-updates 5/6] gnu: Add rust-bindgen-cli-0.69.

[Efraim Flashner]

I've applied rust-bindgen-cli to the master branch. I renamed it to
remove the version at the end and I switched to the crate-uri since
there's no tests in the bindgen-cli folder of the bindgen git repo.

I also moved it to the rust-apps module and added the shell completions.

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Efraim Flashner   <efraim@flashner.co.il>   רנשלפ םירפא
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