chore: Remove unused rust dependencies

[diconico07]

What this PR does / why we need it:
Clean-up dependencies by removing unused ones and moving test-only ones to dev-dependencies section

Special notes for your reviewer:

If applicable:

• this PR has an associated PR with documentation in akri-docs
• this PR contains unit tests
• added code adheres to standard Rust formatting (cargo fmt)
• code builds properly (cargo build)
• code is free of common mistakes (cargo clippy)
• all Akri tests succeed (cargo test)
• inline documentation builds (cargo doc)
• all commits pass the DCO bot check by being signed off -- see the failing DCO check for instructions on how to retroactively sign commits

[kate-goldenring]

Thank you @diconico07! What tool did you use to detect the unused deps? cargo tree?

[diconico07]

I did it "manually" using RUSTFLAGS=-Wunused-crate-dependencies, on a cargo build then I removed all dependencies it called unused, then I re-added needed ones for tests and optional features as the compiler complained on cargo test and cargo build --all-features.
I looked for another way, using cargo-machete but the tool exposed lot of false positive.

[diconico07]

/version patch