zpc: Remove/relocate rust parts

[rzr]

It will be easier to integrate.

The alternative would be to re-implement the whole project in rust, and rely on its paradigm (using crates.io?)

For the record UnifySDK/build/cargo is 9GB:

du -hsc ../UnifySDK/build/cargo/*
1.2G    ../UnifySDK/build/cargo/uic_gms_build
1.2G    ../UnifySDK/build/cargo/uic_image_provider_build
1.2G    ../UnifySDK/build/cargo/uic_nal_build
1.4G    ../UnifySDK/build/cargo/uic_upti_cap_build
1.1G    ../UnifySDK/build/cargo/uic_upti_writer_build
1.1G    ../UnifySDK/build/cargo/uic_upvl_build
2.2G    ../UnifySDK/build/cargo/unify_build
9.0G    total

I am not a rust expert but I don't think we want that