Update librustzcash to its next release

[conradoplg]

Motivation

We are currently pointing to a specific commit of libruszcash. We should point to the next release after it's published.

Specifications

N/A

Designs

N/A

Solution

Update librustzcash to its next release. Remove the hardcoded dependencies in the workspace Cargo.toml that are copied from the librustzcash workspace Cargo.toml.

Alternatives

Keep pointing to the commit, but that should be avoided

Related Work

N/A

[teor2345]

Duplicate of #2982.